| Event Id | 1901 |
| Source | MSExchangeOMA |
| Description | User <user name> does not have a valid mailbox that ends with the SMTP proxy address <proxy address>. Please make sure that the correct SMTP proxy address is set on the Outlook(R) Mobile Access virtual directory in Internet Information Services. |
| Event Information | According to Microsoft: Cause: This occurs if the user has an invalid e-mail address. Resolution: Check that the user e-mail address is correct. |
| Reference Links | user has an invalid e-mail address |
Catch threats immediately
We work side-by-side with you to rapidly detect cyberthreats
and thwart attacks before they cause damage.