Wondering how to set this for Exchange 2010. Have replicated PF content from EX2003 to a EX2010 DAG member and want to replicate the PF to other DAG members. What I do not want is the EX2003 server getting hit with thousands of backfill requests under any circumstances. It crashed the server when I added the 3 DAG members as replication partners at one time. Indeed I had to end up replicating each folder to EX2010 server then immediately pushing the content out. If I let it replicate on its own the queues just filled up and crashed Exchange. Thanks Neill

update-publicfolder http://technet.microsoft.com/en-us/library/aa997451.aspx Update-PublicFolder -server xxxxxxx Server is the source of the replication.

“Exchange checks the public folder database object in Active Directory for a preferred backfill server. This setting is seldom used. In most circumstances, the backfill process operates most efficiently if Exchange selects a backfill server automatically. Most deployments of Exchange don't need a preferred backfill server. Microsoft Customer Service and Support can provide a script that sets a preferred backfill server if your deployment requires it” ---------Refer to <Understanding Public Folder Replication> Per my knowledge, you can configure the “msExchPreferredBackfillSource” attribute as referred in this article. The attribute is in the exchange 2010 public folder database object, you can see it via ADSI EditorJames Luo TechNet Subscriber Support (http://technet.microsoft.com/en-us/subscriptions/ms788697.aspx) If you have any feedback on our support, please contact tngfb@microsoft.com

Thanks James. I found that article as well after I'd posted and checked the object, attribute is still there in EX2010 as you say. Just testing it now. Cheers Neill