Hi George, I've seen this case where the sharepoint site collection authentication was set up incorrectly. The only issue I've really seen cause problems with the Sharepoint integration is that the site collection has to be the root folder with admin privileges, which gives users a lot of access that most don't need, so when companies don't set it up properly, we get an infinite authorization redirect loop. :( I've yet to find a way to work around this, you just have to go back and set it up with the highest permissions possible. Good luck! Dustin Martin Tier 2 Assigned Support Engineer Workfront