Two DC one is primary, other is secondary. Both set as global catalog.
1.) I need to demote the primary DC so that I can format and reload due to some other issues, however when i run dcpromo I get a dialog box titled "New Credentials" that says "The operation failed because: The attempt to configure the machine account CORP-SRV-01$ on server corp-srv-02.local.com failed. "Access is denied." followed by "Specify an account with Enterprise Administrator privileges to the forest, "local.com". At the bottom of this whole box are text fields where I can type in the username, password, and domain.
2.) I have tried the Administator username and password.
3.) The Administrator profile is a member of the Enterprise Administrator group.
4.) If possible I would like not to force a demotion.
Thanks for the help.