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SabbirAhmedKhan avatar image
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SabbirAhmedKhan asked ZhengqiLou-MSFT commented

Automatic MailboxQuarantine

Hi,

I have Exchange 2016 and I am having an issue with few users whose mailboxes are getting quarantined repeatedly. Following are the methods I tried to resolve this issue but none of them worked for me. User count is getting increased day by day. Could anyone please advise me on this?

  1. Disable-MailboxQuarantine "UserName"

  2. Deleted the registry key in below path.

HKLM\SYSTEM\CurrentControlSet\Services\MSExchangeIS\<ServerName>\Private-{dbguid}\QuarantinedMailboxes{mailbox guid}

Our exchange has no antivirus

Regards,

office-exchange-server-administration
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ZhengqiLou-MSFT avatar image
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ZhengqiLou-MSFT answered ZhengqiLou-MSFT commented

Hi @SabbirAhmedKhan ,

Good day!

After you deleted the registry key, you may have to restart the IIS or dismount and mount the database.
Please check the whether these mailboxes are quarantined or not with

 Get-MailboxStatistics <mailbox> | fl IsQuarantined

If it's not quarantined, please run this cmdlet to repair these mailboxes:

 New-MailboxRepairRequest -Mailbox <mailbox> -CorruptionType ProvisionedFolder,SearchFolder,AggregateCounts,Folderview

BTW, if these don't work, you may consider to move these mailboxes to another database as the final option.

Regards,
Lou


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I already did this but it is not working. when i move to another database it is going to quarantine then i can not move mailbox.

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Hi @SabbirAhmedKhan ,

Will these mailboxes still in the registry? And what's the result of Get-MailboxStatistics?
I tried to Enable-MailboxQuarantine and after deleted the registry key it's OK.

If the issue persists, I would think there could be some error of your Exchange server. What's the version of your Exchange? And have you updated it with the security patch?

Regards,
Lou

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after remove the registry it is wok but after some time again going to quarantine.

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