M365 User blocked from sending emails

 This was a fun one.  Microsoft blocked a user from sending emails a few weeks after the original incident.  When I looked to see where the user would normally show as blocked in the online interface, it was not identified as blocked.  So, the only thing I could think of was to check it in PowersHell.  (Why do I have to use PowersHell for everything...)

1.  Install PowersHell 7 (it is much easier to connect to exchange online)

2.  connect-exchangeonline and login when prompted

3.  get-blockedsenderaddress to see if the account in question was blocked

4.  remove-blockedsenderaddress -senderaddress flast@domain.com