Add user to DefaultAppPool that isn't within IIS_WPG Group
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My issue is two-fold:

 1. Need a user account to write to inetpub/wwwroot that isn't in the IIS_WPG Group
 2. Change the DefaultAppPool account to specified user account in #1

We cannot have anonymous HTTP writing to Server A from Server B from the default anon user account Windows reads from, hence for #2. And due to said server permissions, we cannot have Group IIS_WPG do any writing to inetpub/wwwroot either.

I created a new user account, but it isn't associated to any groups. Then, I added this user to the DefaultAppPool Identity instead of using Network Service. Then, under Inetpub/wwwroot I gave read/write permissions to this user account. Then I restart w3svc.

I am getting a Service Unavailable error now when I try to view any web page with this error in the logs: *A failure was encountered while launching the process serving application pool 'DefaultAppPool'. The application pool has been disabled.*

**Note**: I am not a Windows admin by any means, so what I'm doing is based off of any articles I can find and trusting their accuracy 100%.