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If i add a second Exchagne 2010 public folder copy will it replicate solely with existing 2010 or 2003 as-well

Posted on 2011-09-26
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I am upgrading exchange from 2003 to 2010. I have completed the first painful public folder replication from 2003 to 2010 which bogged down my SMTP connectors for 3 days. My question is that when i enable a second and third copy of my public folders on exchange 2010 servers will they replicate with the 2003 copy of public folders?
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Question by:amwinsit
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by:oldhammbc
ID: 36599772
Yep all public folders should keep in sync as long as they are in the replication options of the folder.!

Hope that helps!!

Dave J
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by:amwinsit
ID: 36599890
My questions is when i add a second 2010 public folder replica is it going to replicate the 350gb bulk from the exist exchange 2010 or if it is going to do 175gb from exchange 2010 copy and 175gb from the Exchange 2003 copy. This is important because 175gb from 2003 to 2010 will clog my SMTP connectors and delay email. I understand that changes will be replicated from all servers to all servers.
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oldhammbc earned 2000 total points
ID: 36599979
From past experience with 2007 it should pull the data from the server with the newest version of exchange. This is the official info from Microsoft...

To select servers to use as a backfill source, Exchange first creates a list of all the servers that have replicas of the folder, and then sorts the list according to the following sequence of criteria:

Sort according to server status. Servers that are down or unavailable drop to the end of the list.

Sort according to preferred backfill server (if any). 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.
Sort according to transport cost (lowest to highest). Servers in the same routing group have priority over servers in remote Active Directory sites.
Sort according to Exchange version (newest to oldest).
Sort according to the number of necessary changes available on the server (largest to smallest). Servers that don't have any of the missing changes are dropped from the list.
If one server doesn't have all the necessary changes, Exchange selects the next server in the sorted list and sends a backfill request to that server as well. This process is repeated until all of the changes are requested.

http://technet.microsoft.com/en-us/library/bb629523.aspx

Hope that helps a bit more!

Dave J
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