Currently I am using RT 4.0.8 with Shibboleth and I now want to upgrade to 4.4.2. I wasn’t here when the current install was created, but it does use Shibboleth without issue. After doing a lot of digging I found that they achieved this by adjusting the RT::Authen::ExternalAuth plugin using:
http://archiv.cesnet.cz/doc/techzpravy/2010/request-tracker-shibboleth
While I know this method isn’t officially sanctioned by Best Practical or the plugin developer (at least to my knowledge) I was trying to find a better way enabling Shibboleth with RT across multiple institutions. And yes, I did attempt to use the same method and it doesn’t work on the newer version.
Any insights and assistance would be greatly appreciated.