You have promoted your server to a DC, but find that when you go into server manager the alert prompting to promote the server to a DC is still there.
This seems to be a bug and there is an easy way to get around this:
- Click Server Manager
- Click the link to promote server to DC
- Wait for the process to timeout, until you receive the error below. Click show more so the error pops up in a small window.
Error determining whether the target server is already a domain controller. The target server is already a domain controller
- Click the OK button
- Click cancel button, so no windows are now showing
- Close server manager
- Open server manager and the alert should have disappeared