Exchange Online service alert

The issue has now been Resolved:

Preliminary root cause: A new rule inadvertently prevented external email messages from autoforwarding. More detail will be provied in the Post-Incident Report.

Microsoft has reported the following issue with Exchange Online.

Title: Can’t forward or receive external email
User Impact: Users may be unable to forward or receive external email.
Current status: We’re gathering diagnostic data for analysis.
Scope of impact: Impact affects any user attempting to forward or receive external email.
Next update by: Wednesday, May 26, 2021, at 12:00 PM UTC

We will look to update this post when we have an update from Microsoft regarding the Exchange issue.