You can change the password through the Change Password application.
You can open the Change Password application from the Administrator tool or with the following URL:
http://<fully qualified host name>:<port>/passwordchange/
The Service Manager uses the user password associated with a worker node to authenticate the domain user. If you change a user password that is associated with one or more worker nodes, the Service Manager updates the password for each worker node. The Service Manager cannot update nodes that are not running. For nodes that are not running, the Service Manager updates the password when the nodes restart.
For an LDAP user account, change the password in the LDAP directory service.