An authentication error occurred. The function requested is not supported (FIXED)
An authentication error has occurred error message pops up on your desktop when you try to connect to another PC with the Remote Desktop Connection app?
To fix the error, you can also try to enable the Encryption Oracle Remediation policy setting with the Group Policy Editor
Computer Configuration - Administrative Templates - System - Credentials Delegation - Encryption Oracle Remediation
Now open the key Encryption Oracle Remediation and change its status to Enabled. Also, set the Protection level to Vulnerable.
Now check if the issue is resolved.
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remote desktop authentication error has occurred. the function requested is not supported