kl343
Joined 4 years ago
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Comment · 3 years ago
Comment · 4 years ago
If the sender is using Exchange Online, this might explain why OOO replies would be marked as spam more frequently:
https://github.com/MicrosoftDocs/OfficeDocs-Support/blob/pub...
"By design, Exchange Online Protection uses the high risk delivery pool (HRDP) to send OOF replies, because OOF replies are lower-priority messages."
The school did not "take over" his MS account. At some point (likely amidst a mountain of other onboarding tasks for his daughter's enrollment) he would have received an invitation to join the school's Azure AD tenant as a guest/external user. In this case, he chose to join using his Microsoft account, rather than create a new email-based guest account.
"Leaving" the school's org only breaks one side of the federation, and the guest account and it's association to the school's Azure tenant still remains.
To resolve, he'll need contact the school and have them delete the account. Meanwhile, it probably would have been better to create the app beneath an Azure AD tenant belonging to the non-profit org in the first place.