Hi all,

I am process of migrating Exchange 2010 to Exchange 2013. Co-existence is setup and mailbox movement is in progress.

Currently there are multiple dynamic distribution group exists on Exchange 2010. what is the appropriate way to migrate them to Exchange 2013 ? . When I see the information of these DDG's using exchange shell I see that ExchangeVersion value is "0.1 (8.0.535.0)" that means Exchange 2007. Also "AddressListMembership" value of these dynamic distribution groups is showing "{\Default Global Address List}" which is Exchange 2007/exchange 2010 GAL which will be removed once we uninstall source Exchange 2010 server from the environment.

I am handling only the migration part of this client and not aware of the history of this environment. Can anyone tell me if I can migrate these dynamic distribution groups to Exchange 2013 server or do I need to create new DDG on Exchange 2013 same as the old ones ?

Hi,

Distribution group is saved on Active Directory, so you don't need do any action if the distribution groups are in the same forest.

Exchange 2010 will only allow management of Dist Groups if they have been upgraded.

About the ForceUpgrade parameter, this parameter suppresses the following confirmation: "To save changes on object <object name>, the object must be upgraded to the current Exchange version. After the upgrade, this object can't be managed by an earlier version of the Exchange Management Tools. Do you want to continue to upgrade and save the object?" This confirmation occurs when you upgrade a distribution group that was created in Microsoft Exchange Server 2003. You can't manage an Exchange 2003 distribution group by using the Exchange Management Console until you update the object's version and change the recipient filter by using either the RecipientFilter or IncludedRecipients parameters.

Best Regards.