Remote Desktop Connection Error Code 0x904 < Certified >

Maya’s stomach dropped. She grabbed her work laptop, connected to the VPN, and tried to RDP into the main file server. After a few seconds of loading, a small dialog box appeared: An internal error has occurred. Error code: 0x904 She tried again. Same error. She tried connecting to a different workstation on the same network—that worked fine. It was just the server.

She texted her boss: “Server is back up. It wasn't down—just a security handshake error because my laptop was outdated. All fixed.” remote desktop connection error code 0x904

Maya remembered now: two weeks ago, IT had pushed a security patch (CVE-2018-0886) to all servers to fix a CredSSP vulnerability. Her laptop (which she rarely updated) was still using the old, insecure encryption method. The server was enforcing the new, secure method. They were speaking different languages. Maya’s stomach dropped