I have a DAG exch 2010 setup that has been in place for 1 year with 2 Mailbox server. I just added 2 more MB servers to the DAG, but they have no dbs on them as of yet. I am getting complaints from users with outlook 2003 and 2007 saying now that cannot connect, but outlook 2010 and 2013 users are ok.
The only roles on these 2 new MB servers I added is the Mailbox role..
There are also exch 2007 servers in this mix because we are in the process of migrating to 2010
Could this be an issue because of me adding the 2 new MB servers?