DA Password Self-Service 4.x - Service Unavailable HTTP Error 503 (4271370)

The information in this article applies to:

DeskTop Authority Password Self-Service 4.x 

Title 

Service Unavailable. HTTP Error 503. The service is unavailable.

Problem Description 

HTTP Error 503. The service is unavailable. This error occurs in a web browser trying to access the DAPSS (Desktop Authority Password Self-Service) sites.

Cause 

There can be multiple causes for this error, all resulting in the DAPSS application pool stopping.

The identity account running the DAPSS application pool is running under a domain user account which is locked in Active Directory, or the user account password has been changed.

It is also possible the user account running the application pool is not a member of the local IIS_IUSRS (IIS 7) security group on the IIS Server.

Resolution 

Unlock the account within Active Directory and re-start the DAPSS application pool.

Re-set the password on the Identity Account within IIS and re-start the DAPSS application pool.

Add the Active Directory User account running as the Identity Account on the DAPSS application pool to the IIS_IUSRS local security group on the IIS server.

Additional Information 

How to Add Service Accounts to the IIS_IUSRS Group