Forum Discussion

Tin Contributor

Jul 03, 2026

Outlook Classic - Crashes When Drafting with Copilot in RDS environment

Hi all, I'm interested to see whether anyone else is experiencing this issue, particularly in an RDS environment. We have a number of users who have paid-for Microsoft 365 Copilot licences, includi...

copilot

outlook

Jamony

MCT

Jul 03, 2026

Hi Chris , I’d treat this as an Office build plus RDS compatibility issue until proven otherwise. Check whether the same user works on a normal workstation, then test Outlook safe mode and disable add-ins. I’d also compare the Office build before and after the issue started, because Copilot in classic Outlook can be sensitive to build, WebView2, and shared/RDS environment differences.

Chris House

Tin Contributor

Jul 09, 2026

Thanks Jamony,

I agree it's likely to be an Office build and RDS compatibility issue. Copilot in Outlook works absolutely fine outside of RDS on the local workstations. But inside the RDS session, invoking Copilot as described above causes Outlook to crash. The same behaviour occurs for all the users with a paid-for M365 Copilot licence.

Outlook Classic itself, even without Copilot, is very well known in the community for being very sensitive and tempermantal!