Hi Matt, Great blog!
A question regarding External guests in Private Channels
You wrote “There’s an important implication here: if you’re looking to invite guests to your PC to share only certain information with them and not the rest of the Team, you cannot do this.”
Great write-up. Clears up a lot of things, and while it seemed like it’s over-architected, I can see why the team made the decision to use these unique SharePoint site collections instead of securing the permissions of a folder, for example. Thanks!