When you try to connect to a remote Windows server using Remote Desktop Connection Client after May 8, 2018 you get this error: CredSSP encryption oracle remediation error window
- Navigate to policy path: Computer Configuration -> Administrative Templates -> System -> Credentials Delegation and double click setting name: Encryption Oracle Remediation
- Enable it and set Protection Level to Vulnerable. Click OK
Ran into this issue last week, this local GPO setting on my machine allowed me to RDP into the server.