System Mailbox Error

Question

So I am finishing up moving all my user mail boxes from 2013EX to 2019EX , and I noticed when I go to create a migration batch I see the follwoing error:

"The object domain.com/Microsoft Exchange System Objects/SystemMailbox{056311A3-31AB-4FD4-A6DF-8B9C45F1A639} has been corrupted or isn't compatible with Microsoft support requirements, and it's in an inconsistent state. The following validation errors happened:

Database is mandatory on UserMailbox."

Is this a system mailbox for 2013EX?
Should I be concerned?
Anyway to verify this won't adversely affect 2019EX?
Thanks, B

Answer 1

Hi @BCL ,

I checked the arbitration mailbox of Exchange 2013 and Exchange 2019, but there is no matched entries with the “SystemMailbox{056311A3-31AB-4FD4-A6DF-8B9C45F1A639}” in your error message. So, looks like this is not a necessary SystemMailbox and not related to core functions of the of Exchange server. Considering that its corruption has caused the error message, it is suggested for you to try to open the Active Directory Users and Computes > domain.com > Users in your Active Directory and remove the entry with the name mentioned in your error message, and try the migration batch again to see if your issue could be resolved.

Hope this could help.

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