Hello AD experts.
I recently checked the schema on our primary domain controller within mmc and found that when I right click Active Directory Schema>Operations master that there was an error. In the box where the current schema master should have been listed was blank, and the box underneath had 'ERROR' in it and said that the schema master was offline.
I transfered the schema master and domain naming master roles manually, and when I went back into the mmc there was an entry for the schema master and it was reporting a status of online.
I rebooted the server after close of businees, and checked again, the server has reverted back to an error status. I have 2 domain controllers. The server that should be the schema master and domain naming master is also the RID/PDC and GC. The other DC is the infrastructure master. The rid/pdc/infrastructure roles when checked in AD all seem OK. If anyone can help with my missing schema master that'd be great.