Outlook Mail changing format to html not working

[Steel353]

Hello,

since few days, we cannot proceed to change an mail (stored in inbox) from plain text to html.
Everytime we want to save the mail, it bounces back to text.
O365 on Prem Exchange.

Saving the mail on desktop, editing and changing to html works fine.

But it worked directly in Inbox and its much more efficient.
Does anyone have the same Problem?

[#2]

This has also affected any Macro changing formats too. The body doesn't change as if it's locked.  

As of 22 Nov 2022 is working again