We had a situation recently where a Windows DC (with schema master/fsmo roles) flipped its profile from domain network to public network causing all sorts of issues. Is there a way to have redundancy with the schema master and other roles. We have a mix of 2008 R2 and 2012 R2 domain controllers but are in the process of migrating to 2012 R2. Is there a way to keep the domain operational if this were to happen again? Thank you.