If you want to make your environment more secure, it's recommended to disable Legacy Authentication in Microsoft 365. Check this post to know how to do the same.
17hon MSN
No escape: Microsoft flatlines Office Online Server — it's now Microsoft 365 cloud or nothing
Microsoft is officially ending support for Office Online Server on December 31, 2026, marking the end of its self-hosted ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback