A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.
Hi,
This usually requires checking whether the issue is user-specific or organization-wide.
A good next step is to run a Message Trace in the Exchange Admin Center (under Mail Flow) this will show you if emails are being delivered, redirected, or blocked, and help narrow down the cause.
I’ve shared a full step-by-step troubleshooting video here that covers all checks: https://youtu.be/b0lfn74B_H4
Hope this helps!
Best regards,
Ahmed Masoud