Some users are reporting the following error when trying to open their ACS email from a NIPR Computer.
Request Id: 54ceabed-6d4a-415c-b62e-782b4f3f4d01
Correlation Id: 1f5080c5-3b1c-47e2-8707-696695627848
Timestamp: 2022-03-24T10:37:29Z
Message: AADSTS500113: No reply address is registered for the application.
If you receive this error it could be because the URL you are using has a redirect in it. Try using Office.com to get to your webmail.