What is your Exchange server version and build number?
Please run the following command to get the information above:
Get-ExchangeServer | Format-List Name,Edition,AdminDisplayVersion
One community member encountered a similar issue before and he/she finally resolved it via the following method. In that case, the database was dirty shutdown and we could verify it via the command below:
eseutil /mh <database>.edb
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You were right the database corruption was the issue. We have eventually engaged Microsoft support on this and they performed the repair.
The procedure was to dismount the database and run eseutil /p on the .edb file, as they call it "hard repair" of the database.
After that we were able to move and export all affected mailboxes.
Also, as best practices after running the repair on the database we created a new database and migrated all mailboxes to that new database.
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Source: Mailboxes causing crashes on the database,
and getting quarantined - Exchange 2016 CU8
Regards,
Manu Meng
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