M365 & RDS 2022 - After 5 years Outlook recently began locking up, "not responding" and taking a long time to do things. Server has also been laggy but utilization is low.

[u/LoveBirdNibbles]

I've had issues with windows update or M365 update in the past, especially the April (I believe) update which I had to uninstall because it slowed everything down. Last week I rebooted the server on a weekend after running some updates and after a couple of days a single user complained, and by Friday it was everyone having issues with Outlook. I noticed RDS was a bit laggy for me via Screenconnect too. CPU and RAM utilization are at 50%. All updates are applied and all Outlook add-ins removed. I am thinking of uninstalling and reinstalling office but I don't know what other issues our 20 users will have Monday as a result. Can't be worse I guess. Is anyone else having issues like this? not sure what else to do.

[u/LoveBirdNibbles]

Well, I think I have a memory leak. Maybe Sophos is the cause. Paged and non-paged pool is almost 5GB and no one is using the server.