Service Unavailable message when browsing Password Manager web sites (4226467)

When attempting to view one of the Password Manager sites (PMAdmin, PMHelpDesk or PMSelfService) you receive a Service Unavailable message.

NOTE: If you cannot browse to the Default Web site (http://localhost) and the DefaultAppPool is stopped or crashes each time you browse to any website, contact Microsoft or consult Microsoft documentation to determine why IIS is not functioning properly.

This issue may occur if the application pool for the Password Manager web site is configured incorrectly in Microsoft Internet Information Services (IIS).  This issue may occur if one or more of the following conditions are true:

1. The application pool is not running.
2. The application pool account uses an incorrect password.
3. The application pool account is not a member of the IIS_IUSRS group on the server.

The default Application pools used by Password Manager for PMAdmin, PMHelpdesk, and PMSelfService can be found under the Application Pools node within Internet Information Services (IIS):

1.  In IIS, expand Application Pools.
2. Ensure the PMAdmin, PMHelpdesk, and PMSelfService Application Pools are started.
3. If they are not started (Stopped), verify the account used as the Application Pool identity is active and correct. Right-click each PMxxxx application pool and select Advanced Settings. Select the Identity tab. Re-enter the credentials.
4. Start or Restart the Application Pools once the credentials are re-entered.
5. If Password Manager is installed on a member server, verify the Identity account is a member of the Local Administrators group.
6. If the Identity account is not a member of the IIS_IUSRS local group, you may also see a "Service Unavailable" message.
7. Additionally, an IISReset may be necessary following starting or restarting the Application Pools.