We have an Intranet site set up at my company that currently uses Claims Based Authentication.
In order for Kerberos pass-through to work properly with a couple of our Web Parts that we'd like to serve up on the Intranet site, we need to change it to Classic Authentication.
This part isn't the problem, as I know how to do that without much fuss using the SharePoint PowerShell:
$webApp = Get-SPWebApplication "http://OurIntranetURL"
$webApp.UseClaimsAuthentication = $False;
What becomes the problem is that after doing this, the Intranet breaks and throws out "500 Internal Server Error - An Unknown Error has Occurred" or something to that effect with no further explanation.
Using the reverse of the PowerShell commands above, we swapped it back to Claims Based (because this is an in-production environment... the test environment worked flawlessly...) so it would un-break, and this did fix it with no issues. I have not yet tried re-converting to Classic because I don't want to break the Intranet for an extended period of time.
Any help that can be given here at all will be greatly welcomed.