The deprecation of EWS in Exchange Online starts today. This is a multi-step process, years in the making, and this post has lots of important information. We will keep this post updated if we have n...
Updated Oct 26, 2026
Version 11.0
Blog Post
Yay, more confusion. The chart in this document does not clearly state what happens if we already set EWSEnabled=True. My understanding was that Microsoft would add the list of EWSAllowedAppIDs on our behalf if this were the case, but this chart suggests that is only the case if EWSEnabled is still Null on October 8-9.
- Nino_Bilic
Microsoft
I made a clarification to the table; that clearer?
Yes, Microsoft will create the EWSAllowedAppIDs if the list is "NULL" (as in it does not exist).
