We have 5000 Exchange 2010 mailboxes. We are preparing to apply new Retention Policy Tags. Currently we are using Managed Folder Policies inherited from Exchange 2007. There are no longer any Exchange 2007 servers in our forest. The new Retention Policies are the same as the Managed Folder Policies, which is to delete messages that are more than 1 year old.
My question is, when applying the new Retention Policy Tags, will this cause Outlook to perform a full resynchronization of the OST file, or will it just process metadata to apply the new tags?
