windows locks out on SAS server

[super25]

I was reported multiple lockouts for a user on windows caused by sas compute server, how can i find the reason for this and possible avoid this occurring again? 

 - Users RDP to windows 2016 to use sas tools

 - no password changes recently

 - IWA integrated

 - SAS 9.4M

[AnandVyas]

Is the password stored in any batch script or sas program which isn't updated after the last password change?

[SASKiwi]

Do users logout from the RDP computer or disconnect? Disconnecting can leave ghost sessions using old passwords that can lock users out.