The following are the steps to change SAS external account password:
FYI: The SAS Spawned Server (sassrv) account is the only external account that need to be updated in SAS via SAS Deployment Manager.
Open SAS Deployment Manager run as administrator i.e.
Click OK i.e.
Choose Update Passwords option and click Next i.e.
Choose existing configuration directory and click Next i.e.
Put FQDN (fully qualified domain name) & sasadm@saspw internal id password of the SAS server and click Next i.e.
Put FQDN & SharedServices internal id password of the SAS server and click Next i.e.
Choose SAS external id sassrv (SAS Spawned Server: the required user account for the process owner of SAS Stored Process Servers and SAS Pooled Workspace Servers.) and click Next i.e.
Put updated password for the external account sassrv and click Next i.e.