Hello
To extend your screen in an Azure remote session, you can follow these steps:
Open the Remote Desktop client (mstsc.exe).
Click on the “Show Options” button.
Navigate to the “Display” tab.
Check the box that says "Use all my monitors for the remote session".
Alternatively, you can use the “/multimon” switch on the mstsc.exe command line.
You can also add “Use Multimon:i:1” to the RDP file.
If you’re using the Remote Desktop app from the Microsoft Store and having issues with multiple monitors, you might want to try using the Windows 64-bit version of the Remote Desktop client instead.
Please note that these settings might not apply if you’re already in a remote session. You may need to disconnect and reconnect for the changes to take effect.