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Updated Oct 27, 2026
Version 21.0
Blog Post
Does the EWS retirement timeline apply to Microsoft 365 tenants operated by 21Vianet as well?
If so, will it follow the same timeline as the global Microsoft 365 service?
Thanks!
Greg Taylor - EXCHANGE
Microsoft
MicrosoftIt applies to all clouds, same timeline
Thanks for confirming.
Just to clarify — are behaviors consistent across different clouds as well?
For example:
- The response when EWS is blocked (HTTP status code, error message, etc.)
- The expected behavior of EwsEnabled flag and the app allow list
Will these behave the same as in the global Microsoft 365 service?
- Greg Taylor - EXCHANGE
Yes, we are aiming for consistency in all clouds.