You may all know about the Password Policy feature which was introduced with 11100 builds of ServiceDesk Plus. Now we have an additional function "Change Password Redirection" in the password policy feature which is available from the 11123 builds of ServiceDesk Plus.
This function allows ServiceDesk Plus admins to enable a forced password reset policy, which redirects users, who log in for the first time, to the change password page.
Admin Tab >> General Settings >> Security Settings >> Password Policy.