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StefanoC66's avatar
StefanoC66
Iron Contributor
Jan 20, 2025

System mailbox corrupted

We're migrating from exchange 2013 to 2019 on-prem.

All the mailboxes have been migrated to the new server including all the "system" mailbox as arbitration, auditing, etc

Checking the enviroment, before decomissioning the exchange 2013 server we noticed an error

we got this system mailbox that we don't understand what it is 

Get-Mailbox -filter { (name -like "SystemMailBox*") } | ft -AutoSize

WARNING: The object XXXXXX/Microsoft Exchange System Objects/SystemMailbox{3654B126-D8E0-47B3-85FA-2CA0FCFF7711} has been corrupted or isn't compatible with Microsoft support
requirements, and it's in an inconsistent state. The following validation errors happened:
WARNING: Database is mandatory on UserMailbox.
WARNING: Database is mandatory on UserMailbox.
Name                                                Alias                                               ServerName ProhibitSendQuota
----                                                -----                                               ---------- -----------------
SystemMailbox{3654B126-D8E0-47B3-85FA-2CA0FCFF7711} SystemMailbox{3654B126-D8E0-47B3-85FA-2CA0FCFF7711} XXXXXX   Unlimited

The server mentioned in the "servername" column, here changed to XXXXX, does not exists anymore as it was an old DC decomissioned.

The recipientTypeDetails of this mailbox is 

RecipientTypeDetails                   : LegacyMailbox

 

is it a mailbox that is needed, and so be recovered in a way, or can this be deleted ?

 

  • I can't find that mailbox guid between the arbitration mailboxes, probably it is too old and maybe not even from 2013

    https://learn.microsoft.com/en-us/exchange/architecture/mailbox-servers/recreate-arbitration-mailboxes?view=exchserver-2019

  • I can't find that mailbox guid between the arbitration mailboxes, probably it is too old and maybe not even from 2013

    https://learn.microsoft.com/en-us/exchange/architecture/mailbox-servers/recreate-arbitration-mailboxes?view=exchserver-2019

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