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Exchange 2010

Applies to: Exchange Server 2010 SP2, Exchange Server 2010 SP3

Topic Last Modified: 2015-03-09

Use the Set-MailboxRestoreRequest cmdlet to change restore request options after the request has been created. You can use this cmdlet to recover from failed restore requests.

Set-MailboxRestoreRequest -Identity <MailboxRestoreRequestIdParameter> [-AcceptLargeDataLoss <SwitchParameter>] [-BadItemLimit <Unlimited>] [-BatchName <String>] [-Confirm [<SwitchParameter>]] [-DomainController <Fqdn>] [-Priority <Normal | High>] [-WhatIf [<SwitchParameter>]]

You need to be assigned permissions before you can run this cmdlet. Although all parameters for this cmdlet are listed in this topic, you may not have access to some parameters if they're not included in the permissions assigned to you. To see what permissions you need, see the "Mailbox restore request" entry in the Mailbox Permissions topic.


Parameter Required Type Description




The Identity parameter specifies the identity of the restore request. The Identity parameter consists of the alias of the mailbox to be restored and the name that was specified when the restore request was created. The identity of the restore request uses the following syntax: <alias>\<name>.

If you didn't specify a name for the restore request when it was created, Exchange automatically generated the default name MailboxRestore. Exchange generates up to 10 names, starting with MailboxRestore and then MailboxRestoreX (where X = 1–9).




The AcceptLargeDataLoss parameter specifies that a large amount of data loss is acceptable if the BadItemLimit is set to 51 or higher. Items are considered corrupted if the item can't be read from the source database or can't be written to the target database. Corrupted items won't be available in the destination mailbox or .pst file.




The BadItemLimit parameter specifies the number of bad items to skip if the request encounters corruption in the mailbox. Use 0 to not skip bad items. The valid input range for this parameter is from 0 through 2147483647. The default value is 0. We recommend that you keep the default value 0 and only change the BadItemLimit parameter value if the request fails.

If you set the BadItemLimit parameter to more than 50, the command fails, and you receive a warning stating: "Please confirm your intention to accept a large amount of data loss by specifying AcceptLargeDataLoss." If you receive this warning, you need to run the command again, this time using the AcceptLargeDataLoss parameter. No further warnings appear, and any corrupted items aren't available after the process is complete.




The BatchName parameter specifies the name of the batch. Use this parameter to change, create, or remove a batch name.

To remove a batch name, set the BatchName parameter value to an empty string or to null, for example, -BatchName "" or -BatchName $null.




The Confirm switch causes the command to pause processing and requires you to acknowledge what the command will do before processing continues. You don't have to specify a value with the Confirm switch.




The DomainController parameter specifies the fully qualified domain name (FQDN) of the domain controller that writes this configuration change to Active Directory.




The Priority parameter specifies the position in the request queue in which to put this request for processing. Requests are processed in order, based on server health, status, priority, and last update time.




The WhatIf switch instructs the command to simulate the actions that it would take on the object. By using the WhatIf switch, you can view what changes would occur without having to apply any of those changes. You don't have to specify a value with the WhatIf switch.

To see the input types that this cmdlet accepts, see Cmdlet Input and Output Types. If the Input Type field for a cmdlet is blank, the cmdlet doesn’t accept input data.

To see the return types, which are also known as output types, that this cmdlet accepts, see Cmdlet Input and Output Types. If the Output Type field is blank, the cmdlet doesn’t return data.

This example changes the second restore request for Ayla\MailboxRestore1 to skip 10 corrupt mailbox items.

Set-MailboxRestoreRequest -Identity "Ayla\MailboxRestore1" -BadItemLimit 10

This example changes the first restore request for Kweku's mailbox to skip 100 corrupt items. Because the BadItemLimit is greater than 50, the AcceptLargeDataLoss parameter must be specified.

Set-MailboxRestoreRequest -Identity "Kweku\MailboxRestore" -BadItemLimit 100 -AcceptLargeDataLoss
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