We have exchange 2007 SP3 servers, Exchange 2013 CU3 with all rules (no DAG) server and Office 365 .
Exchange 2013 CU3 servers were installed initially only for office 365 migration needs. They configured as hybrid servers.
No, after the migration I would like to install Exchange 2013 servers with DAG.
I am going to install 2 new servers with only Mailbox role on Windows 2008 R2 enterprise.
Also, I will upgrade current Exchange 2013 CU3 to CU7.
Later after making sure everything is ok, I am planning to remove mailbox role from these hybrid servers. Unfortunately, in order to do it, exchange should be removed and re-installed with only client rule.
Will it remove or change significantly hybrid configuration? Is there any manual how to removereinstall exchange without changing hybrid config?