If you’re like me, always messing around with VM’s and server configs, etc., than you might have reached a point where you had to demote your Exchange Server from the DC role. After this your Exchange installation might start giving out some annoying errors like this: So, being tired of this, I did some research and found this piece of valuable information over at Chris and Robin’s Blog: The fix for me was not the highlighted one in that thread, but Adam Miceli's comment: "Delete