This is the RDP library change that can affect Privilege Access Service 19.6 Connectors
How Does the SecurityLayer RDP Library Change Affect Centrify?
There has been a security enhancement that requires the target use a strengthened security protocol. By having the SecurityLayer = 0, the target is using an insecure protocol for communication. The 19.6 connector therefore refuses the connection and will cause no logins.
This setting should be either:
1 (the default) - This means the target will negotiate to the higher protocol.
2 - This means the target demands a higher protocol.