What’s New

Note: This release is currently available to cloud license accounts in all countries, except Japan. Server license customers will receive it the next ISL Conference Proxy release.

🚀 New Feature

Delete user from Administration

You can now delete users directly from Administration > Users, instead of only from the legacy Users page. Before you delete a user, a confirmation prompt lists everything the deletion will remove.

Administrators must assign the “Create, edit and delete users” permission (Settings > General > Domain Administration), which can be set at the domain, or individual user level.

We plan to retire the legacy Users page in 2027, once Administration supports all of its features. Administration still needs: import users CSV, domain customization (enabling the end of session dialog for ISL Light and ISL Light Client), domain name change, configure live chat, and user limitations (permissions to access reports settings)

Web Portal > Administration > Users > Side Panel (Delete User)

Note: Patch release 5.0.2551.156 is available to cloud license accounts in all countries except Japan. Server license accounts will receive this release in September as part of the new ISL Conference Proxy release.

🐞 Bug Fix

Fixed Ctrl+Alt+Del not working with strict Secure Attention Sequence (SAS) policies

The previous release (5.0.2551.150) switched Ctrl+Alt+Del handling to the native Windows SAS API. On computers where the Group Policy “Disable or enable software Secure Attention Sequence” was enabled with the application allowed to generate SAS set to None, this API call silently failed, so operators could no longer send Ctrl+Alt+Del to the remote computer. This only affected version 5.0.2551.150. The change has been reverted, restoring the previous internal SAS handling, and Ctrl+Alt+Del now works reliably again in these environments.

Note: Patch release 5.0.2551.156 is available to cloud license accounts in all countries except Japan. Server license accounts will receive this release in September as part of the new ISL Conference Proxy release.

🐞 Bug Fix

Fixed Ctrl+Alt+Del not working with strict Secure Attention Sequence (SAS) policies

The previous release (5.0.2551.150) switched Ctrl+Alt+Del handling to the native Windows SAS API. On computers where the Group Policy “Disable or enable software Secure Attention Sequence” was enabled with the application allowed to generate SAS set to None, this API call silently failed, so operators could no longer send Ctrl+Alt+Del to the remote computer. This only affected version 5.0.2551.150. The change has been reverted, restoring the previous internal SAS handling, and Ctrl+Alt+Del now works reliably again in these environments.

Note: This release is available to cloud license accounts in all countries except Japan. Server license accounts will receive this release in September as part of the new ISL Conference Proxy release.

Important: Starting with ISL Light 5.0.2551.150, connections to Windows XP machines are no longer supported, due to the mbedTLS 4.1 upgrade.

ISL AlwaysOn 2.2.10 is the last ISL AlwaysOn version that runs on Windows XP, and ISL Light 5.0.2551.117 is the last ISL Light version that can connect to a Windows XP machine running it. Customers who still need to manage Windows XP machines should keep those two versions: ISL AlwaysOn 2.2.10 on the Windows XP side, and ISL Light 5.0.2551.117 or earlier on the operator side. Upgrading either one beyond these versions will break the connection.

🚀 New Features

Copy and paste files, folders and images on Windows

Previously, copy and paste between your computer and a Windows remote computer only worked for text. You can now copy and paste files, folders, and images too, using Ctrl+C and Ctrl+V just like you would locally. This works when both your computer and the remote computer are running Windows.

Large copies transfer in the background so they don’t slow down your session, and any copy or paste already in progress will complete even if screen sharing is stopped. All copy and paste activity is logged for auditing purposes. Copying multiple items at once and larger files is also more reliable now, thanks to an increased timeout and larger read size.

Updated security library, mbedTLS 4.1

Internal mbedTLS library was updated to version 4.1.0, moving off the previous library version that had reached end of life and was no longer being maintained. The SSL MUX channel now uses TLS 1.3. As part of this change, support for very old, outdated encryption methods was dropped, so if you’re running a very old version of ISL Light, you may need to update it to keep connecting.

Numeric keypad for Join Session

Added support for a numeric keypad in the Join Session window. The keypad can be shown or hidden through the menu option “Show Numeric Keypad” / “Hide Numeric Keypad” and can also be opened using the --touch-pad command line argument.

ISL Light Client > Show/Hide Numeric Keypad

Add “Open Monitors in Separate Windows” to Toolbar / Extend Monitor Selection

The fourth monitor, fifth monitor, and “Open Monitors in Separate Windows” options now each have their own dedicated button in the session toolbar. When there is not enough space in the toolbar, these buttons remain available in the “more” dropdown.

ISL Light > In Session > “Monitors 1-5” buttons and “Open Monitors in Separate Windows” button

Ctrl+Alt+Del now uses the system API

ISL Light no longer uses the internal SAS library for sending Ctrl+Alt+Del to the remote computer. The system SAS API is now used instead.

Faster OS detection on Unix

ISL Light now queries OS information on Unix-based systems directly through the system API instead of starting a separate process to run the “uname” command. This returns more accurate information, and is also faster.

🔧 Improvements

Improved handling of failed SSL/TLS connections

Users sometimes experienced rare connection failures during SSL/TLS session startup which could lead to a crash. Handling of failed connections during SSL/TLS startup was redesigned and the issue is no longer reproducible.

macOS: Cmd+Q no longer closes ISL Light without warning

Users experienced an issue on macOS where pressing Cmd+Q during an active session would immediately close ISL Light without a confirmation dialog. The functionality was redesigned and the issue is no longer reproducible.

Fixed touch input not blocked by Block Remote Input

Users experienced an issue where the Block Remote Input feature did not block and touch/pen events on the remote computer. The functionality was redesigned and the issue is no longer reproducible.

Fixed incorrect control status display

Users experienced an issue where the status bar did not correctly show “Client has control” when the client joined a session without allowing remote control. The functionality was redesigned and the issue is no longer reproducible.

Edit session settings now save reliably with Enter

Users experienced an issue where not all “Edit session” options were saved when pressing the Enter key. The functionality was redesigned so that Enter only saves the changes when focus is on the Save button, and the issue is no longer reproducible.

Fixed input field visibility at 125% scaling

Users experienced an issue where the session input field was not fully visible when Windows display scaling was set to 125%. The functionality was redesigned and the issue is no longer reproducible.

Fixed File Manager time zone display

Users experienced an issue where the time shown in File Manager was not displayed in the local time zone, which was confusing. The functionality was redesigned and the issue is no longer reproducible.

Fixed password field overlapping “show password” icon

Users experienced an issue where the password text overlapped the “show password” icon when the input became long. The functionality was redesigned and the issue is no longer reproducible.

Fixed oversized Connect button

Users experienced an issue where the connect button was too wide when connecting to a remote computer using certain languages. The functionality was redesigned and the issue is no longer reproducible.

Fixed incorrect font on Linux

Users experienced an issue where an incorrect font was used in ISL Light on Linux. The functionality was redesigned and the issue is no longer reproducible.

Hide remote sound option on unsupported platforms

Users experienced an issue where the Stream/Request Remote Sound option was shown in the tools menu when connected to a macOS or Linux computer, even though remote sound streaming is not supported on those platforms. The functionality was redesigned and the option is now hidden when connected to unsupported platforms.

🐞 Bug Fixes

Fixed mandatory password change error

Users experienced an issue where a mandatory password change resulted in a “No data from API” error. The functionality was redesigned and the issue is no longer reproducible.

Fixed restart and resume via command line

Users experienced an issue where the cmdline --on-connect "desktop?admin=restart" did not enable restart and resume in some cases, specifically when the client had ISSC daemon installed but did not have admin privileges. The functionality was redesigned and the issue is no longer reproducible.

Fixed dashboard dropdown menu behavior

Users experienced an issue with dropdown menus on the dashboard after a previous popup type change. The popup type management for the create (+) and hamburger menus on the dashboard was disabled, so the menus fall back to the default popup type.

Fixed recording playback setting conflict

Users experienced an issue where the setting “Play recording once it’s finished” did not work when the “Start recording when a session is started” setting was enabled. The functionality was redesigned and the issue is no longer reproducible.

Fixed missing devices in Talk settings

Users experienced an issue where the Talk section in ISL Light Settings did not show any audio or video devices to choose from when no call was active, and the microphone and camera tests had no device to use. The functionality was redesigned so devices are enumerated when the talk plugin loads, and the issue is no longer reproducible.

Fixed accessibility issue on macOS

Users experienced an issue on macOS where the “Incorrect username or password” text was not correctly read by accessibility software. The functionality was redesigned and the issue is no longer reproducible.

Other fixes and improvements

Bug fixes, security updates, missing translations, and other general improvements.

Note: This release is available to cloud license accounts in all countries except Japan. Server license accounts will receive this release in September as part of the new ISL Conference Proxy release.

🚀 New Features

Copy and paste files, folders and images on Windows

Previously, copy and paste between your computer and a Windows remote computer only worked for text. You can now copy and paste files, folders, and images too, using Ctrl+C and Ctrl+V just like you would locally. This works when both your computer and the remote computer are running Windows.

Large copies transfer in the background so they don’t slow down your session, and any copy or paste already in progress will complete even if screen sharing is stopped. All copy and paste activity is logged for auditing purposes. Copying multiple items at once and larger files is also more reliable now, thanks to an increased timeout and larger read size.

Updated security library, mbedTLS 4.1

Internal mbedTLS library was updated to version 4.1.0, moving off the previous library version that had reached end of life and was no longer being maintained. As part of this change, support for very old, outdated encryption methods was dropped, so if you’re running a very old version of ISL AlwaysOn, you may need to update it to keep connecting.

Ctrl+Alt+Del now uses the system API

ISL AlwaysOn no longer uses the internal SAS library for sending Ctrl+Alt+Del to the remote computer. The system SAS API is now used instead, and the bundled sas.dll is no longer included in the installation.

Faster OS detection on Unix

ISL AlwaysOn now queries OS information on Unix-based systems directly through the system API instead of starting a separate process to run the “uname” command. This returns more accurate information, and is also faster.

🔧 Improvements

Fixed touch input not blocked by Block Remote Input

Users experienced an issue where Block Remote Input did not block multitouch gestures and touch input on the remote computer. The functionality was redesigned and the issue is no longer reproducible.

🐞 Bug Fix

Fixed logon notification appearing with no active user session

On macOS, the logon notification window could appear even when no user was logged in. Handling was updated so the notification is now skipped when there is no active user session.

Fixed decoding failure for compressed data streams

Previously, certain actions could fail with an error because the XZ LZMA decoder was unable to correctly finish decoding a compressed data stream. This has been fixed, so those actions now complete successfully.

Note: This release is currently available to cloud license accounts in all countries, except Japan. Server license customers will receive it the next ISL Conference Proxy release.

🚀 New Feature

Delete computers from Administration

You can now delete computers directly from Administration > Computers, instead of only from the Computers dashboard or desktop app where you connect to devices. A confirmation prompt appears before the computer is removed, and every deletion is recorded in the audit log. This action requires “computer management” permissions. Users without this permission will see the delete option disabled, with a tooltip explaining why.

Web Portal > Administration > Computers > Side Panel (Delete Computer)

Note: This release is available in all countries except Japan.

🚀 New Features

File transfer

Operators can now request file access on a remote Android device and transfer files in both directions. The Android user receives a confirmation prompt and, once accepted, grants the necessary storage permission. Files can be renamed, deleted, and new folders can be created. When file access is active, a Revoke File Access option appears in the menu.

ISL Light (operator) connected to Android device

Storage permission is granted through system settings on Android 11 and newer, or through a system dialog on Android 6 to 10.

MDM deployment for remote access

Administrators can now pre-configure ISL Light remote access on Android devices using MDM (Mobile Device Management). Configuration is provided via the restrictionCmdline key in the MDM bundle as a link generated by the Set unattended access option in ISL Light. The configuration is applied at app launch and only re-applied when it changes. A Reset Deployment option was added in Remote Access settings to force re-applying the configuration.

Improved desktop sharing performance

The ZRLE codec used for desktop sharing was rewritten with a simpler and cleaner implementation. The new implementation improves desktop sharing performance and allows further enhancements.

Session code formatting

Session codes are now automatically formatted with a space every 3 digits as the user types, both when entering a code to join and when displaying support session codes. This makes long codes easier to read and type.

ISL Light Android > Support (session code)

Logo updated to ISL Online powered by PDQ

The default ISL Light logo was updated. Custom logo support was also improved: the maximum allowed width was doubled and a minimum vertical margin was added, allowing wide custom logos to scale further and appear more proportional.

targetSDK raised to 35

The Android targetSDK was raised to version 35 to meet current Google Play requirements.

Support for 16 KB page size

ISL Light now supports 16 KB memory page size, required for newer Android devices and chipsets that use this page size. This ensures compatibility and stable performance on supported hardware.

AutoTransport SSL protocol and cipher settings

Two new options were added to AutoTransport: ssl_protocol and ssl_ciphers. These allow configuring which SSL/TLS protocol versions and cipher suites are used. Ciphers can be specified using numeric hex codes, for example 0x1302 0x1301. Protocol versions can be set using 3-byte hex ranges, for example 0x0303-0x10000 for TLS 1.2 and higher.

Video color conversion library updated

The video color conversion library was replaced with libyuv, providing better maintained and more performant YUV-to-RGB conversion.

xz LZMA decoder enabled

The XZ/LZMA decoder is now included by default in all builds.

ecdh_ctx log key in mbedTLS log line

The mbedTLS log line now includes the ecdh_ctx key, indicating which algorithm was used to establish the shared secret. Useful for diagnosing connection and encryption issues.

🐞 Bug Fixes

Universal Addon Android – Add support for Enter key

Users experienced an issue where the Enter key was not supported when controlling an Android device via the Universal Addon. The functionality was redesigned and the Enter key is now handled correctly.

Broken UI on Android 15

ISL Light had layout issues on Android 15 devices due to changes in how the system handles window insets. The layout handling was redesigned and the interface now renders correctly.

Android 14 and 15 required camera permission to start a session

On Android 14 and 15, ISL Light required camera permission to be granted before a session could start, even when the camera was not being used. Camera permission is now requested at app launch rather than at session start, so it no longer blocks session initiation.

Pixel 9 stopped showing screen after screen lock and unlock

When a user was sharing their screen on a Pixel 9 device and locked then unlocked the screen, ISL Light stopped sharing. On Android 15 and newer, media projection is stopped by the system when the screen is locked. The session now handles this correctly and stops when the screen is locked. For unattended (AlwaysOn) sessions, the user is prompted to unlock the device before the session continues.

ISL Light crashed when connecting to unattended Android after reboot

ISL Light crashed on Android when a remote user tried to connect to an unattended Android device after a reboot, before the local user had opened the app. The initialization order was corrected so the app starts up correctly in this scenario.

Crash during call when app was minimized for too long

ISL Light crashed when it was minimized for an extended period and the OS reclaimed memory. The app now correctly resumes call state when brought back to the foreground. As part of this fix, the Show/Hide Call and Show/Hide Viewer buttons were renamed to Show Call, Show Viewer, and Show Chat for improved clarity.

Crash when connecting to remote computer with password prompt

ISL Light crashed on Android when connecting to a remote computer and the password prompt dialog was shown. The dialog implementation was corrected.

Simultaneous operator and client actions could cause crash

ISL Light could crash on Android when the operator and client performed actions at the same time during a session. Session state handling was corrected to prevent the crash.

App stopped working when permissions were changed during a session

If camera or microphone permissions were revoked while a remote session was active, ISL Light stopped working. The app now handles permission changes during a session correctly.

ISL Light crashed when a call was initiated by the operator on Android

ISL Light crashed on Android when the operator started a call. Notification initialization was corrected.

User could not connect to unattended Android after adding it to the list

After adding an unattended Android device to the list, connecting to it failed. Session startup handling was corrected.

User could not connect to unattended computer from Android

Connecting to an unattended computer from an Android device failed. The connection handling was corrected.

User could not accept or deny a call after rejoining a session

When a session was rejoined after ISL Light had previously closed, accepting or denying an incoming call did not work correctly. Session initialization was corrected.

Closing remote desktop while connected to unattended computer prevented returning to the screen

After closing the remote desktop view while connected to an unattended computer, the user could not open the remote screen again. The visibility state of the viewer option was corrected so it can be re-enabled.

Loading spinner remained after closing an AlwaysOn session

After closing an ISL AlwaysOn session from Android, the loading spinner remained on screen. Session cleanup was corrected.

Incoming call notification not shown when ISL Light was minimized

When an operator started a call while ISL Light was minimized, no notification was shown. A call notification is now displayed on Android 8 and newer. On Android 12 and newer, a native call notification is used.

Audio call did not work when camera permissions were disabled

An audio call failed to start if camera permissions were disabled. The permission request flow was corrected so camera permissions no longer block audio-only calls.

Turning off client microphone from ISL Light Desk turned off both microphone and camera

When the operator turned off the client microphone from ISL Light Desk, both the microphone and camera on the Android client were disabled. The dialog flow for microphone and camera handling was corrected.

Call from ISL Light Desk was cancelled when Android permissions were granted

A call initiated from ISL Light Desk was cancelled when the Android user granted microphone or camera permissions during the call. Plugin state for microphone and camera is now set correctly when a permission is requested.

Microphone automatically turned on when switching apps during a video call

The microphone turned on automatically when the user switched away from ISL Light and returned during a video call. The behavior was corrected.

Enter key not working when controlling Android via Universal Addon

The Enter key was not handled correctly when an operator was controlling an Android device via the Universal Addon. Enter key handling was redesigned and now correctly injects a newline or performs a navigation action depending on the focused field and Android version.

Remote control not immediately available after activating Universal Addon

After activating the Universal Addon, remote control was not instantly available in the session. The caching of the selected injection method was corrected.

Universal Addon download option shown on Zebra devices

Users on Zebra devices were prompted to install the Universal Addon even though it is not supported on those devices. The Universal Addon option is now hidden on Zebra devices.

Desktop streaming stopped due to JPEG decoding issue

In certain cases desktop streaming stopped working due to a JPEG decoding error caused by incorrect encoding on the streaming side. libjpeg-turbo was updated to version 3.1.0 and the issue was resolved.

Downloaded files from ISL AlwaysOn File Sharing could not be opened

Users were unable to open files downloaded from the ISL AlwaysOn File Sharing directory in ISL Light on Android. File download handling was redesigned and files now open correctly.

Desk and client chat messages were displayed switched

Chat messages from the operator and client were displayed with incorrect sender alignment in the session. A regression was reverted and the chat logic was corrected.

Session message dialog closed when user reconnected

A message dialog shown during a session was dismissed when the session reconnected. The dialog is now stored in the session state and re-shown after reconnection.

Remote system information returned empty values on Android 16

System Information for an Android 16 device showed empty values. Reporting was added for uptime, CPU usage and chip, storage, display, network interface, network speeds, and battery state.

Viewer area did not shift when the keyboard was opened

When connected to a remote session on Android 15 and newer and the on-screen keyboard was opened, the remote screen area was not adjusted. The viewer now correctly adapts when the keyboard is shown.

Instructions dialog was clipped in viewer

The instructions dialog shown when the remote viewer started was not fully visible on screen. Inset handling was corrected so the dialog is displayed within the visible area. Camera cutout avoidance in landscape mode was also fixed.

Hidden clickable area in call view

There was an invisible clickable area in the call view that allowed touches to pass through to the chat layout underneath. The call layout frame now correctly intercepts all touch events.

Searching for server never stopped when an incorrect address was entered

If an incorrect server address was entered in settings, ISL Light kept searching indefinitely without stopping or showing an error. The search handling was redesigned to handle this case correctly.

Missing translation when maximum licensed connections were reached

Some strings were not translated when the maximum number of licensed connections was reached. The translation context mapping was corrected.

ISL Light crashed when opening settings while logged in

ISL Light crashed on Android when connecting to an ISL Conference Proxy that did not have the ISL AlwaysOn module installed. A null check was added to prevent the crash.

Session timeout setting did not work correctly on Android

The Session timeout setting did not function correctly on Android and was removed.

MediaProjection used instead of root capture by default

On rooted devices, ISL Light now uses MediaProjection for screen capture by default, replacing the root capture method. A setting is available on rooted devices to change this behavior.

SSL cipher suites simplified

The mbedTLS cipher suite configuration was simplified to align with the server-side OpenSSL configuration. The following cipher types were removed: 3DES (except TLS-RSA-WITH-3DES-EDE-CBC-SHA), DHE, ECDH, and CAMELLIA.

WinINet HTTP proxy: bypass and force authentication options

Two new options were added to AutoTransport for wininet-http and wininet-https transports. http_proxy_force_auth causes ISL Light to immediately use the configured username and password when connecting through a proxy, resolving issues when the Windows system account is not permitted but a specific proxy user is. http_proxy_bypass allows specifying which hostnames should use a direct connection instead of the proxy.

Crash watch framework updated

ISL Light Android was migrated to the updated hefa crash watch framework for crash reporting.

Note: This release is currently available to cloud license accounts in all countries, except Japan. Server license customers will receive it in the September 2026 ISL Conference Proxy release.

🚀 New Feature

Customizations dashboard

Domain admins can now create, edit, duplicate, reset, and delete ISL Light customizations directly from Administration. Customizations are scoped to your domain, and one can be marked as the default used across your organization. Duplicating a customization makes it easy to test a variation before rolling it out.

Logo & colors: replace the logo, icon, and key visual with your own, and set your primary color, primary button text color, and secondary color. You can also customize some text within the application, including the window title and executable name.

Web Portal > Customization > Logo & Colors

Configuration: control ISL Light’s behavior using the same options you’d otherwise set with command line arguments, organized into:

• Session: automatic recording, black screen (curtain mode) and its timeout, the client top bar, opening a URL on session start or end, desktop background visibility during streaming, behavior on session start, stream quality, and automatically starting audio or video calls.
• Dashboard: showing the Computers and Sessions tabs, inviting another operator, the “remember password” checkbox, and transferring a session to another operator.
• Login: the Forgot Password link, the Join a Session option, and the “remember me” checkbox.
• Security: locking the remote computer on connection loss, on session end, or at session start.
• Network: transport options for the session.

Web Portal > Customization > Configuration

Note: This release is available in all countries except Japan. For server licence customers, it is included in the ISL Conference Proxy 5.0.2617.45 release.

🚀 New Features

Session stage performance tracking

ISL Light now collects anonymous end-to-end performance data for each stage of a connection. Each stage is timed and recorded as UMA metrics. Collected data can optionally be forwarded to ISL Conference Proxy for further analysis.

🐞 Bug Fix

Password not retrieved from Keychain on macOS in run-once mode

When ISL Light was launched in run-once mode on macOS, the saved login or computer access password was not retrieved from Keychain. The issue was caused by a change in application binary signing. Password retrieval from Keychain now works correctly in run-once mode.

Incorrect CPU usage shown in System Information on Windows

The CPU usage value displayed in the System Information panel when connected to a Windows machine did not match the value shown in Task Manager. The calculation was corrected to report accurate CPU usage.

ISL Light name substitution not applied in all locations

Custom name substitution for ISL Light was not applied in the Welcome screen and About window. The issue was introduced when the add title command line argument was added. Substitution handling was redesigned and both locations now display the correct substituted name.

Note: This release is available in all countries except Japan. For server licence customers, it is included in the ISL Conference Proxy 5.0.2617.45 release.

🚀 New Features

Session stage performance tracking

ISL AlwaysOn now collects anonymous end-to-end performance data for each stage of a connection. Each stage is timed and recorded as UMA metrics. Collected data can optionally be forwarded to ISL Conference Proxy for further analysis.