Prepare Mailboxes for Cross-Forest Move Requests: Exchange 2010 Help

Prepare Mailboxes for Cross-Forest Move Requests

Applies to: Exchange Server 2010 SP2

Topic Last Modified: 2010-05-11

Microsoft Exchange Server 2010 supports remote mailbox moves via the New-MoveRequest cmdlet. To move a mailbox from an Exchange Server 2010, Exchange Server 2007, or Exchange Server 2003 forest to another Exchange 2010 forest, the Exchange 2010 target forest must contain a valid mail-enabled user with a specified set of Active Directory attributes. (Exchange 2010 doesn't support moving an Exchange 2000 Server mailbox.) If there is at least one Exchange 2010 Client Access server deployed in the forest, the forest is considered an Exchange 2010 forest.

To prepare for the mailbox move, you must create mail-enabled users with the required attributes in the target forest. Here are two recommended approaches to creating mail-enable users with the necessary attributes:

If you deployed Microsoft Identity Lifecycle Manager (ILM) for cross-forest global address list (GAL) synchronization, the recommended approach to creating the mail-enabled user is to use Service Pack 1 (SP1) for ILM 2007 Feature Pack 1 (FP1). We've created sample code that you can use to learn how to customize ILM to synchronize the source mailbox user and target mail user.
For more information, including how to download the sample code, see Prepare Mailboxes for Cross-Forest Moves Using Sample Code.
If you created the target mail user using an Active Directory tool other than ILM/MIIS, use the Update-Recipient cmdlet with the Identity parameter to run the Address List service to generate the LegacyExchangeDN for the target mail user. We have created a sample Windows PowerShell script that reads from and writes to Active Directory and calls the Update-Recipient cmdlet.
For more information about using the sample script, see Prepare Mailboxes for Cross-Forest Moves Using the Prepare-MoveRequest.ps1 script in the Shell.

After creating the target mail user, you can then run the New-MoveRequest cmdlet to move the mailbox to the target Exchange 2010 forest.

For more information about remote move requests, see the following topics:

For more information about remote mailbox moves and remote legacy moves, see Understanding Move Requests.

The remainder of this topic describes the Active Directory mail user attributes that are required for a mailbox move. These attributes are configured for you when you use either the code or script to prepare for the mailbox move. However, you can manually copy these attributes using an Active Directory editor.

Active Directory User Attributes Required for a Mailbox Move

To support a remote mailbox move, the mail user object in the target Exchange 2010 forest must have the Active Directory attributes that are described in this section:

Mandatory attributes
Optional attributes
Linked attributes
Linked user attributes
Resource mailbox attributes
Additional attributes

Mandatory Attributes

The following table lists the minimum set of attributes that need to be configured in ILM on the target mail user for the New-MoveRequest cmdlet to function correctly.

Mail user's attributes

Mail user's Active Directory attributes	Action
displayName	Copy the corresponding attribute of the source mailbox or generate a new value.
Mail	Directly copy the corresponding attribute of the source mailbox.
mailNickname	Copy the corresponding attribute of the source mailbox or generate a new value.
msExchArchiveGUID and msExchArchiveName	Directly copy the corresponding attribute of the source mailbox. Attributes are only available if the source mailbox is Exchange 2010.
msExchMailboxGUID	Directly copy the corresponding attribute of the source mailbox.
msExchRecipientDisplayType	-2147483642 (decimal) //equivalent to 0x80000006 (hex).
msExchRecipientTypeDetails	128 (decimal) /0x80 (hex).
msExchUserCulture	Directly copy the corresponding attribute of the source mailbox.
msExchVersion	44220983382016 (decimal).
cn	Copy the corresponding attribute of the source mailbox or generate a new value.
proxyAddresses	Copy source mailbox's proxyAddresses attribute. Additionally, copy source mailbox's LegacyExchangeDN as an X500 address in the proxyAddresses attribute of the target mail user. Note: The proxyAddresses of the source mailbox user must contain an SMTP address that matches the authoritative domain of the target forest. This allows the New-MoveRequest cmdlet to correctly select the targetAddress of the source mail-enabled user (converted from the source mailbox user after the mailbox move request is complete) to ensure that mail routing is still functional.
sAMAccountName	Copy the corresponding attribute of the source mailbox or generate a new value. Ensure that the value is unique within the target forest domain that the target mail user belongs to.
targetAddress	Set to an SMTP address in the proxyAddresses attribute of the source mailbox. This SMTP address must belong to the authoritative domain of the source forest.
userAccountControl	Constant: 514 //equivalent to 0x202, ACCOUNTDISABLE \| NORMAL_ACCOUNT.
userPrincipalName	Copy the corresponding attribute of the source mailbox or generate a new value. Because the mail user is logon disabled, this userPrincipalName isn't used.

Optional Attributes

It isn't mandatory that the following attributes are configured for the New-MoveRequest cmdlet to function correctly; however, synchronizing them provides a better end-to-end user experience after moving the mailbox. Because the GAL in the target forest displays this target mail user, you should set the following GAL-related attributes.

GAL-related attributes

Mail user's Active Directory attributes	Action
c	Directly copy the corresponding attribute of the source mailbox.
co	Directly copy the corresponding attribute of the source mailbox.
countryCode	Directly copy the corresponding attribute of the source mailbox.
company	Directly copy the corresponding attribute of the source mailbox.
department	Directly copy the corresponding attribute of the source mailbox.
facsimileTelephoneNumber	Directly copy the corresponding attribute of the source mailbox.
givenName	Directly copy the corresponding attribute of the source mailbox.
homePhone	Directly copy the corresponding attribute of the source mailbox.
info	Directly copy the corresponding attribute of the source mailbox.
initials	Directly copy the corresponding attribute of the source mailbox.
l	Directly copy the corresponding attribute of the source mailbox.
mobile	Directly copy the corresponding attribute of the source mailbox.
msExchAssistantName	Directly copy the corresponding attribute of the source mailbox.
msExchHideFromAddressLists	Directly copy the corresponding attribute of the source mailbox.
otherHomePhone	Directly copy the corresponding attribute of the source mailbox.
otherTelephone	Directly copy the corresponding attribute of the source mailbox.
pager	Directly copy the corresponding attribute of the source mailbox.
physicalDeliveryOfficeName	Directly copy the corresponding attribute of the source mailbox.
postalCode	Directly copy the corresponding attribute of the source mailbox.
sn	Directly copy the corresponding attribute of the source mailbox.
st	Directly copy the corresponding attribute of the source mailbox.
streetAddress	Directly copy the corresponding attribute of the source mailbox.
telephoneAssistant	Directly copy the corresponding attribute of the source mailbox.
telephoneNumber	Directly copy the corresponding attribute of the source mailbox.
title	Directly copy the corresponding attribute of the source mailbox.

Linked Attributes

A linked attribute is an Active Directory attribute that references other Active Directory objects in the local forest. You can't directly copy the linked attribute values from a mailbox in the source forest to a mail user in the target forest. First, you must find the Active Directory objects in the source forest that the source mailbox attribute refers to. Then, you must find the corresponding Active Directory objects in the target forest for the above-mentioned Active Directory object in the source forest. And finally, set the target mail user's attribute to refer to the Active Directory objects in the target forest.

Linked attributes

Mail User's Active Directory attributes	Action
altRecipient	Correspond to the source mailbox's altRecipient attribute.
deliverAndRedirect	Directly copy the corresponding attribute of the source mailbox. This attribute is a Boolean value that should be set along with altRecipient.
Manager (and its backlinks)	Correspond to the source mailbox's manager attribute.
MemberOf (backlinks)	This is the backlink of group member attribute.
publicDelegates (and its backlinks)	Correspond to the source mailbox's publicDelegates attribute.

Linked User Attributes

If you want to move a mailbox to an Exchange 2010 resource forest, the mailbox in the resource forest is considered a linked mailbox. In this scenario, you need to create a linked mail user in the (target) resource forest. To create a linked mail user, you need to set the attributes shown in the following table.

Linked mail user attributes

Mail user's Active Directory attributes	Action
msExchMasterAccountHistory	Directly copy the corresponding attribute of the source mailbox.
msExchMasterAccountSid	If the source mailbox has msExchMasterAccountSid, copy it. Otherwise, copy the source mailbox's objectSid.
msExchRecipientDisplayType	Constant:-1073741818 (decimal) //equivalent to unsigned 0xC0000006.

Note:
A linked mailbox can only be created if there's forest trust between the source forest and target forest.

If the source object is disabled and the msExchMasterAccountSid attribute is set to self (resource mailbox, shared mailbox), don't stamp anything on the target user.

If the source object is disabled and the msExchMasterAccountSid attribute isn't set, the mailbox is invalid.

If the source object is enabled and the msExchMasterAccountSid attribute is set, the mailbox is invalid.

Resource Mailbox Attributes

If you want to move a resource mailbox to an Exchange 2010 forest, you need to set the attributes shown in the following table on the target mail user.

Resource mailbox attributes

Mail user's Active Directory attributes	Action
msExchRecipientDisplayType	If the source mailbox is a conference room: Constant -2147481850 (decimal) //equivalent to unsigned 0x80000706. If the source mailbox is an equipment mailbox: Constant -2147481594 (decimal) //equivalent to unsigned 0x80000806.
msExchResourceCapacity	Directly copy the corresponding attribute of the source mailbox.
msExchResourceDisplay	Directly copy the corresponding attribute of the source mailbox.
msExchResourceMetaData	Directly copy the corresponding attribute of the source mailbox.
msExchResourceSearchProperties	Directly copy the corresponding attribute of the source mailbox.

Additional Attributes

In Exchange 2007, the Move-Mailbox cmdlet also copied the attributes shown in the following table when moving a mailbox. You can optionally copy these attribute if required by your organization.

Resource mailbox attributes

Mail User's Active Directory attributes	Description
comment	Directly copy the corresponding attribute of the source mailbox.
deletedItemFlags	Directly copy the corresponding attribute of the source mailbox.
delivContLength	Directly copy the corresponding attribute of the source mailbox.
departmentNumber	Directly copy the corresponding attribute of the source mailbox.
description	Directly copy the corresponding attribute of the source mailbox.
division	Directly copy the corresponding attribute of the source mailbox.
employeeID	Directly copy the corresponding attribute of the source mailbox.
employeeNumber	Directly copy the corresponding attribute of the source mailbox.
employeeType	Directly copy the corresponding attribute of the source mailbox.
extensionAttribute1-15	Directly copy the corresponding attribute of the source mailbox.
homePostalAddress	Directly copy the corresponding attribute of the source mailbox.
internationalISDNNumber	Directly copy the corresponding attribute of the source mailbox.
ipPhone	Directly copy the corresponding attribute of the source mailbox.
language	Directly copy the corresponding attribute of the source mailbox.
lmPwdHistory	Directly copy the corresponding attribute of the source mailbox.
localeID	Directly copy the corresponding attribute of the source mailbox.
mAPIRecipient	Directly copy the corresponding attribute of the source mailbox.
middleName	Directly copy the corresponding attribute of the source mailbox.
msDS-PhoneticCompanyName	Directly copy the corresponding attribute of the source mailbox.
msDS-PhoneticDepartment	Directly copy the corresponding attribute of the source mailbox.
msDS-PhoneticDisplayName	Directly copy the corresponding attribute of the source mailbox.
msDS-PhoneticFirstName	Directly copy the corresponding attribute of the source mailbox.
msDS-PhoneticLastName	Directly copy the corresponding attribute of the source mailbox.
msExchBlockedSendersHash	Directly copy the corresponding attribute of the source mailbox.
msExchELCExpirySuspensionEnd	Directly copy the corresponding attribute of the source mailbox.
msExchELCExpirySuspensionStart	Directly copy the corresponding attribute of the source mailbox.
msExchELCMailboxFlags	Directly copy the corresponding attribute of the source mailbox.
msExchExternalOOFOptions	Directly copy the corresponding attribute of the source mailbox.
msExchMessageHygieneFlags	Directly copy the corresponding attribute of the source mailbox.
msExchMessageHygieneSCLDeleteThreshold	Directly copy the corresponding attribute of the source mailbox.
msExchMessageHygieneSCLJunkThreshold	Directly copy the corresponding attribute of the source mailbox.
msExchMessageHygieneSCLQuarantineThreshold	Directly copy the corresponding attribute of the source mailbox.
msExchMessageHygieneSCLRejectThreshold	Directly copy the corresponding attribute of the source mailbox.
msExchMDBRulesQuota	Directly copy the corresponding attribute of the source mailbox.
msExchPoliciesExcluded	Directly copy the corresponding attribute of the source mailbox.
msExchSafeRecipientsHash	Directly copy the corresponding attribute of the source mailbox.
msExchSafeSendersHash	Directly copy the corresponding attribute of the source mailbox.
msExchUMSpokenName	Directly copy the corresponding attribute of the source mailbox.
otherFacsimileTelephoneNumber	Directly copy the corresponding attribute of the source mailbox.
otherIpPhone	Directly copy the corresponding attribute of the source mailbox.
otherMobile	Directly copy the corresponding attribute of the source mailbox.
otherPager	Directly copy the corresponding attribute of the source mailbox.
preferredDeliveryMethod	Directly copy the corresponding attribute of the source mailbox.
personalPager	Directly copy the corresponding attribute of the source mailbox.
personalTitle	Directly copy the corresponding attribute of the source mailbox.
photo	Directly copy the corresponding attribute of the source mailbox.
pOPCharacterSet	Directly copy the corresponding attribute of the source mailbox.
pOPContentFormat	Directly copy the corresponding attribute of the source mailbox.
postalAddress	Directly copy the corresponding attribute of the source mailbox.
postOfficeBox	Directly copy the corresponding attribute of the source mailbox.
primaryInternationalISDNNumber	Directly copy the corresponding attribute of the source mailbox.
primaryTelexNumber	Directly copy the corresponding attribute of the source mailbox.
showInAdvancedViewOnly	Directly copy the corresponding attribute of the source mailbox.
street	Directly copy the corresponding attribute of the source mailbox.
terminalServer	Directly copy the corresponding attribute of the source mailbox.
textEncodedORAddress	Directly copy the corresponding attribute of the source mailbox.
thumbnailLogo	Directly copy the corresponding attribute of the source mailbox.
thumbnailPhoto	Directly copy the corresponding attribute of the source mailbox.
url	Directly copy the corresponding attribute of the source mailbox.
userCert	Directly copy the corresponding attribute of the source mailbox.
userCertificate	Directly copy the corresponding attribute of the source mailbox.
userSMIMECertificate	Directly copy the corresponding attribute of the source mailbox.
wWWHomePage	Directly copy the corresponding attribute of the source mailbox.