Description. Mailboxes are quarantined when they affect the availability of the mailbox database. Typically a software fix from Microsoft is required before releasing a mailbox from quarantine. If a fix isn't deployed before releasing the mailbox, the quarantine on the mailbox will be re-enabled if the condition recurs ...

What is mailbox quarantine?

Mailbox quarantine is a feature in the Exchange Server 2010 information store. Based on values in the registry, the store detects a mailbox or mailboxes that have the potential to or have caused the store to crash and quarantines them for specific period.

Where is spam quarantine mailbox?

Go to your quarantine page at . Sign in, using your Office 365 credentials (user ID and password). On your Quarantine page, you'll see a list of any messages that were sent to you, but were identified as spam and redirected to the quarantine.