New-MailboxRestoreRequest

The AcceptLargeDataLoss switch specifies the request should continue even if a large number of items in the source mailbox can't be copied to the target mailbox. You don't need to specify a value with this switch.

In Exchange 2013 or later or Exchange Online, you need to use this switch if you set the LargeItemLimit parameter to a value of 51 or higher. Otherwise, the command will fail.

In Exchange 2010, you need to use this switch if you set the BadItemLimit parameter to a value of 51 or higher. Otherwise, the command will fail.

The AllowLegacyDNMismatch switch specifies that the operation should continue if the LegacyExchangeDN of the source physical mailbox and the target mailbox don't match. You don't need to specify a value with this switch.

By default, this cmdlet checks to make sure that the LegacyExchangeDN on the source physical mailbox is present on the target user in the form of the LegacyExchangeDN or an X500 proxy address that corresponds to the LegacyExchangeDN. This check prevents you from accidentally restoring a source mailbox into the incorrect target mailbox.

Note: This parameter is being deprecated in the cloud-based service. To complete a mailbox restore request for mailboxes with a LegacyExchangeDN that doesn't match, you need to obtain the LegacyExchangeDN value for the source mailbox and add it to the target mailbox as an X500 proxy address. For detailed instructions, see Restore an inactive mailbox.

The AssociatedMessagesCopyOption parameter specifies whether associated messages are copied when the request is processed. Associated messages are special messages that contain hidden data with information about rules, views, and forms. Valid values are:

• DoNotCopy: The associated messages aren't copied.
• MapByMessageClass: Find the associated message by looking up the MessageClass attribute of the source message. If there's an associated message of this class in both source and target folders, it overwrites the associated message in the target. If there isn't an associated message in the target, it creates a copy in the target.
• Copy: Copy associated messages from the source to the target. If the same message type exists both in the source and the target location, these associated messages are duplicated. This is the default value.

Content filtering doesn't apply to associated messages.

The BadItemLimit parameter specifies the maximum number of bad items that are allowed before the request fails. A bad item is a corrupt item in the source mailbox that can't be copied to the target mailbox. Also included in the bad item limit are missing items. Missing items are items in the source mailbox that can't be found in the target mailbox when the request is ready to complete.

Valid input for this parameter is an integer or the value unlimited. The default value is 0, which means the request will fail if any bad items are detected. If you are OK with leaving a few bad items behind, you can set this parameter to a reasonable value (we recommend 10 or lower) so the request can proceed. If too many bad items are detected, consider using the New-MailboxRepairRequest cmdlet to attempt to fix corrupted items in the source mailbox, and try the request again.

In Exchange 2010, if you set this value to 51 or higher, you also need to use the AcceptLargeDataLoss switch. Otherwise, the command will fail.

Note: This parameter is being deprecated in the cloud-based service. In the future, if you don't use this parameter, Skipped Item approval semantics will be used instead.

The BatchName parameter specifies a descriptive name for restoring a batch of mailboxes. You can use the name in the BatchName parameter as a string search when you use the Get-MailboxRestoreRequest cmdlet.

The CompletedRequestAgeLimit parameter specifies how long the status of a completed restore request is set to Completed. If this parameter is set to a value of 0, the status is cleared immediately instead of being changed to Completed.

The Confirm switch specifies whether to show or hide the confirmation prompt. How this switch affects the cmdlet depends on if the cmdlet requires confirmation before proceeding.

• Destructive cmdlets (for example, Remove-* cmdlets) have a built-in pause that forces you to acknowledge the command before proceeding. For these cmdlets, you can skip the confirmation prompt by using this exact syntax: -Confirm:$false.
• Most other cmdlets (for example, New-* and Set-* cmdlets) don't have a built-in pause. For these cmdlets, specifying the Confirm switch without a value introduces a pause that forces you acknowledge the command before proceeding.

The ConflictResolutionOption parameter specifies what to do if there are multiple matching messages in the target. Valid values are:

• ForceCopy
• KeepAll
• KeepLatestItem
• KeepSourceItem (This is the default value.)
• KeepTargetItem
• UpdateFromSource

This parameter is available only in the cloud-based service.

The ContentFilter parameter uses OPATH filter syntax to filter the results by the specified properties and values. Only contents that match the ContentFilter parameter will be restored. The search criteria uses the syntax "Property -ComparisonOperator 'Value'".

• Enclose the whole OPATH filter in double quotation marks " ". If the filter contains system values (for example, $true, $false, or $null), use single quotation marks ' ' instead. Although this parameter is a string (not a system block), you can also use braces { }, but only if the filter doesn't contain variables.
• Property is a filterable property. For filterable properties, see Filterable properties for the ContentFilter parameter.
• ComparisonOperator is an OPATH comparison operator (for example -eq for equals and -like for string comparison). For more information about comparison operators, see about_Comparison_Operators.
• Value is the property value to search for. Enclose text values and variables in single quotation marks ('Value' or '$Variable'). If a variable value contains single quotation marks, you need to identify (escape) the single quotation marks to expand the variable correctly. For example, instead of '$User', use '$($User -Replace "'","''")'. Don't enclose integers or system values in quotation marks (for example, use 500, $true, $false, or $null instead).

You can chain multiple search criteria together using the logical operators -and and -or. For example, "Criteria1 -and Criteria2" or "(Criteria1 -and Criteria2) -or Criteria3".

For detailed information about OPATH filters in Exchange, see Additional OPATH syntax information.

This parameter is available only in the cloud-based service.

The ContentFilterLanguage parameter specifies the language being used in the ContentFilter parameter for string searches.

Valid input for this parameter is a supported culture code value from the Microsoft .NET Framework CultureInfo class. For example, da-DK for Danish or ja-JP for Japanese. For more information, see CultureInfo Class.

This parameter is available only in the cloud-based service.

This parameter is reserved for internal Microsoft use.

This parameter is functional only in on-premises Exchange.

The DomainController parameter specifies the domain controller that's used by this cmdlet to read data from or write data to Active Directory. You identify the domain controller by its fully qualified domain name (FQDN). For example, dc01.contoso.com.

The ExcludeDumpster switch specifies whether to exclude the Recoverable Items folder. You don't need to specify a value with this switch.

If you don't use this switch, the Recoverable Items folder is copied with the following subfolders:

• Deletions
• Versions
• Purges

The ExcludeFolders parameter specifies the list of folders to exclude during the restore request.

Folder names aren't case-sensitive, and there are no character restrictions. Use the following syntax:

<FolderName>/*: Use this syntax to denote a personal folder under the folder specified in the SourceRootFolder parameter, for example, "MyProjects" or "MyProjects/FY2010".

#<FolderName>#/*: Use this syntax to denote a well-known folder regardless of the folder's name in another language. For example, #Inbox# denotes the Inbox folder even if the Inbox is localized in Turkish, which is Gelen Kutusu. Well-known folders include the following types:

• Inbox
• SentItems
• DeletedItems
• Calendar
• Contacts
• Drafts
• Journal
• Tasks
• Notes
• JunkEmail
• CommunicatorHistory
• Voicemail
• Fax
• Conflicts
• SyncIssues
• LocalFailures
• ServerFailures

If the user creates a personal folder with the same name as a well-known folder and the # symbol surrounding it, you can use a backslash (\) as an escape character to specify that folder. For example, if a user creates a folder named #Notes# and you want to specify that folder instead of the well-known Notes folder, use the following syntax: \#Notes\#.

Wildcard characters can't be used in folder names.

The IncludeFolders parameter specifies the list of folder to include during the restore request.

Folder names aren't case-sensitive, and there are no character restrictions. Use the following syntax:

<FolderName>/*: Use this syntax to denote a personal folder under the folder specified in the SourceRootFolder parameter, for example, "MyProjects" or "MyProjects/FY2010".

#<FolderName>#/*: Use this syntax to denote a well-known folder regardless of the folder's name in another language. For example, #Inbox# denotes the Inbox folder even if the Inbox is localized in Turkish, which is Gelen Kutusu. Well-known folders include the following types:

• Inbox
• SentItems
• DeletedItems
• Calendar
• Contacts
• Drafts
• Journal
• Tasks
• Notes
• JunkEmail
• CommunicationHistory
• Voicemail
• Fax
• Conflicts
• SyncIssues
• LocalFailures
• ServerFailures

If the user creates a personal folder with the same name as a well-known folder and the # symbol surrounding it, you can use a backslash (\) as an escape character to specify that folder. For example, if a user creates a folder named #Notes# and you want to specify that folder instead of the well-known Notes folder, use the following syntax: \#Notes\#.

Wildcard characters can't be used in folder names.

This parameter is available only in on-premises Exchange.

The InternalFlags parameter specifies the optional steps in the request. This parameter is used primarily for debugging purposes.

The LargeItemLimit parameter specifies the maximum number of large items that are allowed before the request fails. A large item is a message in the source mailbox that exceeds the maximum message size that's allowed in the target mailbox. If the target mailbox doesn't have a specifically configured maximum message size value, the organization-wide value is used.

For more information about maximum message size values, see the following topics:

• Exchange 2016: Message size limits in Exchange Server
• Exchange Online: Exchange Online Limits

Valid input for this parameter is an integer or the value unlimited. The default value is 0, which means the request will fail if any large items are detected. If you are OK with leaving a few large items behind, you can set this parameter to a reasonable value (we recommend 10 or lower) so the request can proceed.

If you set this value to 51 or higher, you also need to use the AcceptLargeDataLoss switch. Otherwise, the command will fail.

Note: This parameter is being deprecated in the cloud-based service. In the future, if you don't use this parameter, Skipped Item approval semantics will be used instead.

This parameter is available only in Exchange Server 2010.

The MRSServer parameter specifies the FQDN of the Client Access server on which the instance of the Microsoft Exchange Mailbox Replication service (MRS) is running. This parameter is used for debugging purposes only. Use this parameter only if directed by support personnel.

The Name parameter specifies the name of the specific request for tracking and display purposes. Because you can have multiple restore requests per mailbox, Exchange precedes the name with the mailbox's alias. For example, if you create an export request for a user's mailbox that has the alias Kweku and specify the value of this parameter as RestoreFailedMoves, the identity of this export request is Kweku\RestoreFailedMoves.

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

This parameter is available only in on-premises Exchange.

The Priority parameter specifies the order in which the request should be processed in the request queue. Requests are processed in order, based on server health, status, priority, and last update time. Valid priority values are:

• Lowest
• Lower
• Low
• Normal (This is the default value.)
• High
• Higher
• Highest
• Emergency

This parameter is available only in the cloud-based service.

This parameter is reserved for internal Microsoft use.

This parameter is available only in the cloud-based service.

This parameter is reserved for internal Microsoft use.

This parameter is available only in the cloud-based service.

This parameter is reserved for internal Microsoft use.

This parameter is available only in the cloud-based service.

This parameter is reserved for internal Microsoft use.

This parameter is available only in on-premises Exchange.

The RequestExpiryInterval parameter specifies an age limit for a completed or failed request. When you use this parameter, the completed or failed request is automatically removed after the specified interval expires. If you don't use this parameter:

• The completed request is automatically removed based on the CompletedRequestAgeLimit parameter value.
• If the request fails, you need to manually remove it by using the corresponding Remove-*Request cmdlet.

To specify a value, enter it as a time span: dd.hh:mm:ss where dd = days, hh = hours, mm = minutes, and ss = seconds.

When you use the value Unlimited, the completed request isn't automatically removed.

The SkipMerging parameter specifies folder-related items to skip when restoring the mailbox. Use one of the following values:

• FolderACLs
• FolderProperties
• FolderRules
• InitialConnectionValidation

Use this parameter only if a restore request fails because of folder rules, folder access control lists (ACLs), or initial connection validation.

This parameter is available only in on-premises Exchange.

The SourceDatabase parameter specifies the identity of the database from which you're restoring the soft-deleted or disconnected mailbox. You can use any value that uniquely identifies the database. For example:

• Name
• Distinguished name (DN)
• GUID

This parameter is available only in the cloud-based service.

This parameter is reserved for internal Microsoft use.

This parameter is available only in the cloud-based service.

This parameter is reserved for internal Microsoft use.

The SourceIsArchive switch specifies that the source mailbox is an archive mailbox. You don't need to specify a value with this switch.

You can use this switch only with the SourceMailbox parameter.

The SourceMailbox parameter specifies the soft-deleted mailbox that you want to restore. The best way to identify the soft-deleted mailbox is by its GUID value. You can find the GUID value by running the following command: Get-Mailbox -SoftDeletedMailbox.

The SourceRootFolder parameter specifies the root folder of the mailbox from which data is restored. If this parameter isn't specified, the command restores all folders.

This parameter is functional only in on-premises Exchange.

The SourceStoreMailbox parameter specifies the MailboxGUID of the source mailbox that you want to restore content from.

You can find the MailboxGUID by running the Get-MailboxStatistics cmdlet.

This parameter is available only in the cloud-based service.

This parameter is reserved for internal Microsoft use.

The Suspend switch specifies whether to suspend the request. You don't need to specify a value with this switch.

If you use this switch, the request is queued, but the request won't reach the status of InProgress until you resume the request with the relevant resume cmdlet.

The SuspendComment parameter specifies a description about why the request was suspended. You can only use this parameter if you specify the Suspend parameter.

The TargetIsArchive switch specifies that the content is restored into the specified target mailbox's archive. You don't need to specify a value with this switch.

The TargetMailbox parameter specifies the GUID of the target mailbox or mail user where you want to restore content to. The target mailbox or mail user needs to exist before you can run this command successfully.

You can find the GUID value for the mailbox or mail user by running the Get-Mailbox or Get-MailUser cmdlets.

In Exchange 2016 or later and Exchange Online, this parameter is the type MailboxLocationIdParameter.

In Exchange 2013 or earlier, this parameter is the type MailboxOrMailUserIdParameter.

The TargetRootFolder parameter specifies the top-level folder in which to restore data. If you don't specify this parameter, the command restores folders to the top of the folder structure in the target mailbox or archive. Content is merged under existing folders, and new folders are created if they don't already exist in the target folder structure.

Note: To restore the contents of a primary mailbox to an archive mailbox, use this parameter to specify the archive mailbox folders to migrate the content to. This content will be visible after it's restored. If you don't use this parameter, the restored content is not visible because it's mapped to locations in the archive mailbox that aren't visible to users.

The TargetType parameter specifies the type of mailbox that's the target for the restore operation. Valid values are:

• Archive
• MailboxLocation
• Primary (This is the default value)

The WhatIf switch simulates the actions of the command. You can use this switch to view the changes that would occur without actually applying those changes. You don't need to specify a value with this switch.

This parameter is available only in on-premises Exchange.

This parameter is reserved for internal Microsoft use.