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DP230
Flag for United Kingdom of Great Britain and Northern Ireland asked on

Exchange 2016 quarantined mailbox

Dear EE, my Exchange user has issue of quarantined mailbox. Can you kindly explain the root causes and solutions for it? Many thanks!


I tried these but did not help much, the problem keep happening:

- changed "Crash Count value” in the CrashCount key to 2.

- dismount / remount that user's database 

- disable mailbox and enable again

Exchange

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DP230

8/22/2022 - Mon
M A

Did you try this? i.e.Removing Registry Key and MailboxRepairRequest
https://www.nucleustechnologies.com/blog/how-to-fix-exchange-mailbox-quarantine-issue/
DP230

ASKER
Hi, I did not try the "New-MailboxRepairRequest ", not sure about the time it takes to complete the process because that mailbox is quite big (>30 GB). And during the repair process, can user access mailbox?

User confirmed that he only used web mail, not the Outlook. So what is the root cause?
DP230

ASKER
Hi Mas, I tried but the issue happened again even when the process was completed, it said the fix for "AggregateCounts (4)" was successful.

I noticed when I tried to delete 4 messages (that cannot be viewed) in Inbox folder, the mailbox crashed.
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DP230

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