Multiple monitor issue after upgrade to 1.2.5105.0

I resolved this by:

Running:

mstsc /l

to identify the ids of the monitors.  For me I wanted 1 to be primary and 0 to be secondary. (Note these don't always match the ones you get from using the 'identify' button in the display settings arrangement)

If you look at the coordinates of each monitor, you can identify which is which.  The one that starts at 0,0 is my main (center) monitor, and the one that starts at 2560 x coordinate is the vertical monitor to the right of it)

Then I edited:

%localappdata%\Packages\MicrosoftCorporationII.Windows365_8wekyb3d8bbwe\LocalCache\settings.json

and replaced

"selectedMonitors\":[0,1],

with

"selectedMonitors\":[1,0],

next time i restarted my avd connection it was fixed.

Same problem with 1.2.5716.0 version

TaniaMariscal I'm currently using release 1.2.5709.0 (x64) and this problem no longer occurs.

Apologies for the delayed reaction. I must have overseen it in September...

Seems to be, it still an issue.

A3Koopman1955 is this still an issue?

Our vendor opened a ticket with Microsoft for this issue, and this was the response.

"As this is a known issue, our product team is actively working to resolve it by the next update. The next update should release somewhere around the last week of the January. We recommend to wait for the next update or roll back to the previous version of Remote Desktop Client. Please refer to the below article to roll back to the previous version." - Microsoft

https://learn.microsoft.com/en-us/azure/virtual-desktop/whats-new-client-windows

Hopefully that means this will be over pretty soon.

Potential workaround: Right-click your tenant icon within the Remote Desktop app, then click Settings, turn off the default settings slider, then in the resulting side panel turn off "Fit session to window". This has worked for many of our users, but not all.

We have multiple users running into the same issue. Remote Desktop will not use only the right-side monitors without using the left-most monitor(s). If your monitors, going left to right, are identified as 1,2,3, then you can use 1+2, or all monitors, or any single monitor. But you cannot have Remote Desktop use only 2+3. (With 4 monitors -- and presumably more -- it will use the correct quantity of multiple monitors but only starting from the left side.) Reverting to the previous version fixes the issue, until it auto-updates the next time the app is closed.

I haven't tried this yet, but there is a registry key that MS says can keep it from auto-updating:

https://learn.microsoft.com/en-us/azure/virtual-desktop/users/client-features-windows#admin-management 

I'm not keen on pushing out a registry change to all affected computers, but it seems likely to come to that unless a new version is released soon. And it appears that all computers are affected, but those who don't try to have the left-most screen exempted from Remote Desktop don't notice it.

I have the same issue. I tried a lot of combinations, but it seems only downgrade left...
AVD should be full screen on 2 and 3. Laptop at 1, full screen. 
It is such a big company with such a big budget, but it is still deploying such stupid bugs. Why does not test it? 😞 And another thing I can understand is why I can't change the primary monitor in AVD.

Same problem here - downgrade resolves the issue.

Update, uninstalled current version and reverted to version 1.2.4763.0 and multiple displays started working again.