Replication Issue, Schema mistmatch

i'm in middle of doing on premise exchange migration 2003 2013 using 2010 intermididate server.

there 3 dc's.  one 2003 dc (sbs 2003) primary dc before 2 other 2012r2 dc installed.  i had no issues promoting dcs , initial sysvol replication took place.  the 2003 decommissioned.

what happening group policy files not consistent between 2003 , 2012 dcs.  the logs on 2012 dc show event id 1791.

replication of application directory partition dc=abc,dc=local source 257088c5-3493-4b40-b79b-00f06d35d3ed (abc-sbs.abc.local) has been aborted. replication requires consistent schema last attempt synchronize schema had failed. crucial schema replication functions properly. see previous errors more diagnostics. if issue persists, please contact microsoft product support services assistance. error 8418: replication operation failed because of schema mismatch between servers involved..

i have verified schema id's same, exchange.  repadmin shows clean replication on servers.  i'm waiting install exchange 2013 , update schema.  i don't want start unless problem fixed.  i'm @ loss figure out going on.  i'm not sure if related removal of exchange 2003 2003 server previous night.  i having issue on exchange 2010 box exchange services not start.  i had add exchange server computer object domain admins group fix it.  only mentioning in case it's related, feeling kind of permissions problem.

also have not moved fsmo roles yet.

Windows Server  >  Directory Services