I am not able to use a second monitor on a remote desktop connection on my iMac

Hi, I found the solution and I want to post it here for people who has the same issues.

In Microsoft Remote Desktop, click on the icon for the computer you remote in to. Click the Settings cog above it, then Edit.

Check "Use custom settings" (and this was the trick!) Now you can see the Display tab.

Select "Use all monitors".

Restart MRD and voila!

I have the same issue. I use a mac at home and windows at work. I use dual monitors at the office. When I remote in to the office from home (using Microsoft Remote Desktop), I cannot view my remote session on dual monitors at home. I can only view the remote session on a one monitor and the second monitor shows my mac. I use two monitors at the office and am finding it difficult to work from home because I'm only able to use one monitor. It seems the Microsoft Remote Desktop session just can't be split between the dual monitors.

I'm using Mac Pro M1 16" at home connecting to Microsoft Remote Desktop.

Before connecting, I make sure settings for MRD (right click on icon) are Options -> Assign to All Desktops

Hi I'm having the same issue. Up until last week I was able to connect into my VPN at work via MS remote desktop and work across both my monitor and my Macbook screen quite happily, drag and drop etc... Now I'm not able to do this. I'm updated to the latest Apple OS and Apple Support indicate its a third party issue ie with MS.

I've tried settings on the Mac. I have tried switching off "Displays have seperate spaces" but this just gives me a black screen on the second desktop and I cannot interact with it in any way. There doesn't appear to be any settings on the MS remote desktop app (Ive tried right click) that do anything. Has anyone found a fix?

Hi,

I am also using Microsoft Remote Desktop to login to a Windows 365 PC. But my company decided to use Workspaces instead of PCs.

Within PCs I can see the option Use all monitors, but not in Workspaces. So I couldn't find any options like this.

Is there any solution for this?

I had the same issue with a new set up on my Mac using ipad as second display. When you open the Microsoft Remote Desktop app on your Mac select the "pencil" icon next to the "Bin" icon for the PC you are remoting to. The Edit PC window opens and then select the Display tab and check "Use all monitor". This will allow you to use MRD across all monitors connect to the Mac.

OK. I don't have a dual screen setup as a rule, but I've connected my M1 MacBook Air to an Apple TV as a second non-mirroring monitor, and I can access a Windows PC using Remote Desktop on one screen and then move the cursor across to interact with the Mac on the other one. I'm clearly not understanding what your issue is.

tt2

Did you ever figure out how fix your problem? We are having the same issue

If the remote machine only has a single display, or the remote control software only supports a single display, then the fact that you have two screens is immaterial.

tt2

Before you log in with Remote Desktop, ensure your monitors are not set to mirroring. If the screens are showing one on top of the other. click Stop Mirroring.

that was already selected in my settings “all monitors” but it still only extends my personal mac and not my virtual desktop for work. Can’t figure out a fix yet

Thank you!!!!! I’ve tried everywhere until I found your post! My IT department couldn’t even figure it out. Thank you for sharing!