Hi Emmanuel, if the uninstall/reinstall didn't help, try the troubleshooting below.

Click Settings > Share Screen > Tick the Enable the remote control of all applications.

We have the same exact issue and we had opened a ticket about 1 week ago. I am told by ringcentral that it is a bug in the program. We were told to use a temporary workaround. In the RC Application go to Setting > Video > and change the service to RingCentral Video. It works kind of but it is not pleasant. It is only temporary until the workout the bug.

I have found that Screen Sharing works for Windows LTSC 2019 and newer, but not on Windows LTSC 2016 and older. For me it appears to be a permissions issue with windows privacy settings. But I have not worked out how to change it on LTSC 2016.

What OS are you troubled computers running?

we too have the same issue on the 1607 (or LTSC) versions and only with RCM. RCV does work fine. tried the same fixes, video drivers, checking Enable the remote control of all applications. No luck

The solution is to install the latest version of RingCentral App. Click on Settings then click Video in the second column. For "Video service" select "RingCentral Video".

This changes your server to "v.ringcentral.com" and may cause other issues until you transition all users completely.

That only makes it so that any meetings the user is hosting they are able to share screens, it does not help them when they join others hosting meetings.ringcentral.com meetings. this is still broken on 2016 LTSB (1607)

Yes, we have now all migrated to the latest RC app

If I did that I would have a revolt. My test users complain about lesser quality video, lesser screen share quality the inability to do screen control while training. If RCV would improve these features I would make the switch. It’s not all di in gloom but those are definitely show stoppers. And I’ve already submitted those features to RingCentral over a year ago.

The move caused some stir among the users. The features and behavior are not the same between the new ringcentral cleint and the old zoom based version. So if you do not switch you will just need to live with the zoom bug until the zoom service is discontinued completely. (it is a bug in zoom side, there is a fix if for it if you were running regular zoom, well sort of it is more of a work around)

i'm having a same issue with you guys, how do you resolve the issue ? i tried almost everything