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Tuesday, April 16, 2024

Mailboxes into Quarantine after migrating to Exchange 2019

After migrating mailboxes to exchange 2019 from exchange 2016 . Most of the mailboxes went to quarantine all of a sudden and databases went to dismount state and came back to mount state. We couldn’t bring the databases to a stable state. We realized its a bug in exchange 2019. Initially that it was a refs formatted disk was playing around we were wrong. Still I couldn’t believe this was the fix for the crazy issue.

Get-TransportConfig | fl *size*

You can check maxsendsize and maxreceivesize should not be unlimited. Set to 35 mb for example. It works seamlessly after that . Don’t ask me why. But it works like a charm.

Set-TransportConfig -MaxReceiveSize 35MB -MaxSendSize 35MB

Good to Have –

To Take out a mailbox from Quarantine –

Disable-MailboxQuarantine "Mailbox Name"

To place a mailbox in Quarantine –

Enable-MailboxQuarantine "Mailbox Name"

To check mailboxes which are in quarantine in a database

Get-Mailbox -Database "DBName" | Get-MailboxStatistics | Where {$_.IsQuarantine -eq $True}
Satheshwaran Manoharan
Satheshwaran Manoharanhttps://www.azure365pro.com
Award-winning Technology Leader with a wealth of experience running large teams and diversified industry exposure in cloud computing. From shipping lines to rolling stocks.In-depth expertise in driving cloud adoption strategies and modernizing systems to cloud native. Specialized in Microsoft Cloud, DevOps, and Microsoft 365 Stack and conducted numerous successful projects worldwide. Also, Acting as a Technical Advisor for various start-ups.

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