preface: A Windows Server 2012 R2 domain joined, I'm not a Domain Admin on the customer AD, I'm a Local Server Administrator. After enabling the SSL Cipher Suites order policy and a reboot, RDP connection getting refused, "an internal error occurred" and other error messages. I just realized that I didn't followed the instructions correctly, closing me out: 1. Open a blank notepad document. 2. Copy and paste the list of available suites into it. 3. Arrange the suites in the correct order; remove any suites you don't want to use. 4. Place a comma at the end of every suite name except the last. Make sure there are NO embedded spaces. 5. Remove all the line breaks so that the cipher suite names are on a single, long line. 6. Copy the cipher-suite line to the clipboard, then paste it into the edit box. The maximum length is 1023 characters. I completely miss the 4 and 5 points. following a way to solve the mistake: from another Domain joined Server, open MMC ...