Oct 17, 14:05 CDT
Investigating – Microsoft has posted the following service incident:
Title: Admins may be receiving copies of outbound email to external parties originating from other users in their organization
User impact: Admins may be receiving copies of outbound email to external parties originating from other users in their organization
Current status: We are currently investing customer reports of an issue where Global Tenant Admins may be receiving an unexpected volume of copies of outbound external email originating from other users their organization and marked as potential spam. We will provide an update within 60 minutes.