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Prepare Mailboxes for Cross-Forest Move Requests

Exchange 2010
 

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

Topic Last Modified: 2012-07-23

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.

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

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.

noteNote:
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.

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.

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.

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.

noteNote:
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.

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.

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.

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