Hi! I'm migrating from SBS2003 server to SBS2011, and have just successfully removed Exchange and rebooted. I've done several of these, followed several white papers to ensure proper migration (http://demazter.wordpress.com/2011/02/24/migrate-small-business-server-2003-to-small-business-server-2011/
) as an example. On this migration, when I run a dcpromo (with or without /forceremoval, it doesn't matter), I receive "The removal operation failed. The handle is invalid". I've ensured DNS is set to the NEW (2011 server), rebooted, applied outstanding service packs, etc. and I cannot seem to dcpromo.
What is the recommended way to proceed?