Update 8/12/2025: Added the FAQ to the post. Also, to help shed more light on the Direct Send feature, we published a newer post called Direct Send vs sending directly to an Exchange Online tenant.
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Updated Nov 12, 2025
Version 14.0
Blog Post
Reposting my question from a month ago that is still unanswered:
Regarding the update to deal with accepted domains and Azure Communication Services (ACS), the statement was made weeks ago that the update would be rolled out by November 1st.
Several questions on this:
- Has that change now been deployed everywhere?
- How will we know if our tenant/region/Exchange Online server instance/whatever has been updated?
- How can we test this update without changing this setting and affecting production email delivery?
- If we still have problems with sending via ACS, what kind of issue needs to be created to have someone from MS support address whatever is necessary to fix the issue?