Thursday, 22 December 2016

Microsoft Exchange: Checking a specific mailbox for corruption

Using the 'New-MailboxRepairRequest' we can quickly detect any corruption in a user mailbox.

I recommend using the '-DetectOnly' switch initially to firstly identify what has (if anything) been corrupted e.g.:

New-MailboxRepairRequest -Mailbox user001 -CorruptionType SearchFolder,AggregateCounts,ProvisionedFolder,FolderView -DetectOnly

and then finally - to actually perform the repairs:

New-MailboxRepairRequest -Mailbox user001 -CorruptionType SearchFolder,AggregateCounts,ProvisionedFolder,FolderView

We can also check all mailboxes within a specific database with the '-Database' switch:

New-MailboxRepairRequest -Database MBDB01 -CorruptionType SearchFolder,AggregateCounts,ProvisionedFolder,FolderView -DetectOnly

If you are on Exchange 2013 / 2016 you can use the 'Get-MailboxRepairRequest' cmdlet to view the status of any repair requests:

Get-MailboxRepairRequest | FL

Otherwise (if you are on an older version) you will need to check the event log for the status - specifically event code: 10062 and 10048.

If corruption is detected in the database you will see something like the following:

Corruptions detected during online integrity check for request 1111111-2222-3333-4444-5555555555555
Mailbox:1111111-2222-3333-4444-5555555555555 (Joe Bloggs)
Database:Mailbox Database 01
Corruption Is Fixed FID Property Resolution
"Folder View", No, "1680-E3FFF4 (Inbox)", 0x00000001, "Delete the corrupted view"
"Folder View", No, "1680-E3FFF4 (Inbox)", 0x00000001, "Delete the corrupted view"

I recommend repeating the procedure until the request come back clean.

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