I'm testing a migration from Exchange 2003 to Exchange 2010 and have a lab setup to mirror my prod environment. I have a recipeint updated policy in my Exchange 2003 environment that marks the accounts with a email@example.com. When I create a new user in the domain the policy runs and tags the user account with the generic smtp alias. I then manually edit the address since I have 4 business divisions with different external email aliases.
When I migrated all of the accounts in my test environment to my Exchange 2010 the RUS in the 2010 environment has run again and rebranded all of my accounts with the firstname.lastname@example.org alias and marked that as the default. It seems I'm missing something, and I can't move forward in production if all of my user accounts are going to be rebranded. Is there a way to prevent the RUS from running again once the account has been migrated?
When I try to edit the RUS on the Exchange 2010 server it tells me I have to edit it on the 2003 server.