We have two sites, a main site and a branch office. In the main site we have a mixture of 2008 R2 and 2012 R2 DCs. Recently the FSMO roles were transferred to the 2012 R2 DC (recently brought online), and the domain and forest functional level was increased from 2003 to 2008. It now turns out that during this time the 2008 R2 RODC at the branch office was offline. This RODC has now been brought back online, however it is unable to replicate due to the fact that it is still pointing to the previous 2008 R2 DC for the FSMO roles.
I'm wondering the best way to resolve this. I'm wondering if it is possible to transfer the FSMO roles back to the original 2008 R2 DC (which the RODC is looking to for its FSMO role holder), would this then cause the RODC to replicate again. Would there be any problems with doing this now that the domain and forest functional level has changed. I don't want to corrupt my AD in any way. The RODC has been offline for approximately 2 weeks.