3.1 'HTTP Error 503. The service is unavailable' after installing IIS on Server 2012
Problem
After installing IIS on a new 2012 server, we receive the following message when trying to connect to the 3.1 DB.
'HTTP Error 503. The service is unavailable.'
What service needs to be restarted?
Solution
In IIS, ensure the Default Application Pools are running. If they are not, they need to be started.
To start the DefaultAppPool:
1. Go to a Windows Run Command and enter IIS.
2. Once in IIS, expand the Server Name on the upper left.
3. Click on Application Pools. You will see the DefaultAppPool in the center of the screen.
4. Right-click on it and choose to Start
5. Once started, you should be able to connect. Exit back to Windows.