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snyperjFlag for United States of America

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Trouble logging into MimeCast portal for certain users

We are finding that certain users are unable to login to the Mimecast portal.  It is always a user where their username changed due to getting married or something similiar.  We are on Office 365.

So , for example, Mary Smith (msmith@domain.com) got married and became Mary Jones (mjones@domain.com).   Typically we just create an alias email for the new name without changing the Office365 username and everything works great.  However, these users cannot authenticate and login to the Mimecast portal either with EITHER email address.

Not sure if anyone has run into this and if it is just a quick fix setting change somewhere.  Mimecast not too helpful on this so far saying it is an office 365 issue.
Avatar of Jeff Glover
Jeff Glover
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How are you syncing your AD to MimeCast? LDAP or an agent? IF you go in under Administration | Directories | Directory Groups, and browse your domain, do you see the users old name listed or the new one?
Looks like an AD Sync issue.
Check on Mimecast if the Sync is happening.
Check if you can see both emails of the users on Mimecast and which one is marked as an email and which as sn alias. The one marked as an email should be used for Mimecast login. That would be the UPN from Office365, so the same one as the Office365 login.
And finally is the user trying the Domain or Cloud password? Are both failing?
Also ensure the user isn't Locked in Mimecast, it does that after a few unsuccessful attempts.
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