How to enable and use single item recovery in Exchange 2010
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1. Microsoft Exchange Server MAPI Editor (MFCMAPI) download: 

http://mfcmapi.codeplex.com
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2. Check "SingleItemRecovery" value for a single user:

Get-Mailbox BAndersen | FT Name,SingleItemrecoveryEnabled
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3. Set "SingleItemRecovery" value for a single user: 

Set-Mailbox BAndersen -SingleItemRecoveryEnabled $true
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4. Get the list of mailboxes with Single Item Recovery enabled/not enabled:

4.1 Get the list of mailboxes with Single Item recovery enabled 

Get-Mailbox  | where {$_.SingleItemrecoveryEnabled} | FT Name,SingleItemrecoveryEnabled


4.2 Get the list of mailboxes with Single Item recovery not enabled 

Get-Mailbox  | where {!$_.SingleItemrecoveryEnabled} | FT Name,SingleItemrecoveryEnabled

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5. Set the session scope of the shell commands:

5.1 Set the session scope to a specific Active Directory domain:
# In the example bellow we specify the Active Directory domain "colo.netometer.local"

Set-ADServerSettings -RecipientViewRoot "colo.netometer.local"


5.2 Set the session scope to an Organizational Unit in a specific domain:
# In the example bellow we specify the OU "Pasadena Research" in the domain "netometer.local"

Set-ADServerSettings -RecipientViewRoot "netometer.local/Pasadena Research"

5.3 Set the session scope to the whole forest:

Set-AdServerSettings -ViewEntireForest $true

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6. Enable Single Item Recovery for the mailboxes in the current session scope:

#First we store the list in a variable $mbx
#then we set the value of "SingleItemRecoverEnabled" for each mailbox:

$mbx = Get-Mailbox  | where {!$_.SingleItemrecoveryEnabled}

$mbx | foreach {Set-Mailbox -Identity $_.Identity -SingleItemRecoveryEnabled $true}

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7. Disable Single Item Recovery for the mailboxes in the current session scope:


$mbx = Get-Mailbox  | where {$_.SingleItemrecoveryEnabled}

$mbx | foreach {Set-Mailbox -Identity $_.Identity -SingleItemRecoveryEnabled $false}

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8. Perform Mailbox Search from Exchange Management Shell:

Search-Mailbox "BAndersen" -TargetMailbox "RecoveryUser" -TargetFolder "Recovered_From_Shell" -LogLevel Full -SearchDumpsterOnly:$true -SearchQuery "Important Detail"

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9. Set Retention period to 90 days

Set-Mailbox BAndersen -RetainDeletedItemsFor 90 -UseDatabaseRetentionDefaults $false



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$mbx = Get-Mailbox

$mbx  | foreach {Set-Mailbox -Identity $_.Identity -RetainDeletedItemsFor 365 -UseDatabaseRetentionDefaults $false}
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Get-Mailbox BAndersen | FT Name,RetainDeletedItemsFor

Get-Mailbox | FT Name,RetainDeletedItemsFor

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10. Set Database and Mailbox Recoverable Items Quotas

Get-MailboxDatabase | FT name,RecoverableItemsWarningQuota,RecoverableItemsQuota

Set-MailboxDatabase MBX1-E10 -RecoverableItemsWarningQuota 60GB -RecoverableItemsQuota 80GB



Get-Mailbox BAndersen | FT name,RecoverableItemsWarningQuota,RecoverableItemsQuota,UseDatabaseQuotaDefaults

Set-Mailbox BAndersen -RecoverableItemsWarningQuota 80GB -RecoverableItemsQuota 90GB -UseDatabaseQuotaDefaults $false


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$mbx = Get-Mailbox

$mbx  | foreach {Set-Mailbox -Identity $_.Identity -RecoverableItemsWarningQuota 80GB -RecoverableItemsQuota 90GB -UseDatabaseQuotaDefaults $false}
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Get-Mailbox | FT name,RecoverableItemsWarningQuota,RecoverableItemsQuota,UseDatabaseQuotaDefaults