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sequence contains more than one element  



When creating a user with a mailbox or add a mailbox to an existing user, we receive this error: sequence contains more than one element

What can we do about this?

CP Version: 3.2.315.0

Exchange server 2016


Can you send the log folder to ?

Hi Jacob,

I sent you an email with the log file attached.

1 Answer

This issue was caused by having two public folder master mailboxes when there should only have been one. The bad one had to be removed with SQL Server Management Studio from the sql table.