This is unexplainable to me but if I have IIS 7.5 and I have some web sites defined in it. The web sites work fine most of the time. I have the same setup in two different machines. A TEST and a USE (TEST and PROD essentially). However, something really weird happens on both these machines - it mysteriously changed the app pool to something I never defined it for.
Then on the TEST machine I have the APP POOL set to an identity of a unique account one as the Local System did not work. (That didn't make sense.)
Now, on the USE machine I came to find out that the APP POOL changed there too. However, I could not create the identity to the unique account. That did not work. I had to change it to Local System and then it worked.
The APP POOL on both mysteriously changed from the original app pool to ASP.NET 4.0 Classic.
Does anybody have any idea or know why the APP POOL would change from the original to the ASP.NET 4.0 Classic? And does anybody have any idea why the identities would need to differ? (i.e. the TEST is the opposite of PROD (and they can't alternate))?
I'm stumped on this one and hope that somebody has as answer.