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Wednesday, January 26, 2011

Exchange 2010 New Forest Migration Provisioning Distribution Lists

Exchange 2007 and Exchange 2010 have the ability to provision mailbox enabled users. What about Exchange Distribution Lists? Previous options were to use a third party migration suite or powershell or even LDIFDE. As you noticed ADMT 3.2 by default does provision or create Exchange Distribution Lists. If you use ADMT 3.2 to migrate a Distribution List, it will get migrated to the target forest but as a flat AD group only. Exchange is unware of this group being a Distribution Group. In order for ADMT 3.2 to provision this as an AD group you have to prevent ADMT 3.2 from exluding Exchange attributes during the migration.

Create a new notepad file and name it ADMTexclusion.vbs and enter the lines below.
Set objMig = CreateObject("ADMT.Migration")
objMig.SystemPropertiesToExclude = ""

Then run the file on your ADMT server:

C:\Windows\SysWOW64>cscript c:\admin\scripts\admtexclusion.vbs

Caveats: ADMT excludes Exchange attributes by default to prevent issues with provisioning mailbox users prior to Exchange 2010 SP1. So ensure that you're on SP1. To get additional details read article below. Also note that even though you provision the DL with ADMT it will not bring over all the attributes such as send restrictions, hide from GAL etc.

Exchange 2010 Cross-Forest Mailbox Moves
http://msexchangeteam.com/archive/2010/08/10/455779.aspx


James Chong
MCITP | EA | EMA; MCSE | M+, S+
Security+, Project+, ITIL
msexchangetips.blogspot.com

5 Comments:

OpenID mdrooij said...

Don't include all Exchange attributes in ADMTs sync process. Use Prepare-MoveRequest.ps1 in addition; it processes several attributes contrary to to 1:1 duping, like adding the legacyExchangeDN to the target's proxyAddresses and you may get issues when duping proxyAddresses when the e-mail address policy stamping on the object is disabled.

1:19 AM  
Blogger jamestechman said...

This comment has been removed by the author.

7:55 PM  
Anonymous www.sillones.nom.es said...

Quite useful material, much thanks for this article.

9:44 AM  
Blogger nithyanadham singaravadivelu said...

Hi james Chong,

Such a nice article ,it helped me lot while at the time of migrating the distribution list .

At the same time i had faced some issues during the DL migration ,

Issue : Migrated mail enabled distributed group on the target forest is not showing up in the gal .

Error on ADMT log : showInAddressBook value is missing on the migrated distribution group.

please help me to overcome this issue .....

4:18 AM  
Blogger nithyanadham singaravadivelu said...

Hi james Chong,

Such a nice article ,it helped me lot while at the time of migrating the distribution list .

At the same time i had faced some issues during the DL migration ,

Issue : Migrated mail enabled distributed group on the target forest is not showing up in the gal .

Error on ADMT log : showInAddressBook value is missing on the migrated distribution group.

please help me to overcome this issue .....

4:19 AM  

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xml:lang="en" lang="en"> MS Exchange Tips: Exchange 2010 New Forest Migration Provisioning Distribution Lists