I've never once had links take any sort of noticeable time to open outside of the scanner link/redirect. Which doesn't have to do with edge or outlook. You probably are conflating two issues.
No other browser does this, and it only happens when opening the link from outlook. Which does make sense to me because edge has some kind of outlook integration. Probably our incompetent network admin and weird ass network and AD situation does not help, but it's still a bunch of microsoft products that don't work properly together.
I was not aware that's a thing. So you're saying every link I get on outlook has a redirect link stuck in front of it because of azure AD? But why does that not cause chrome or firefox to load the pages slowly?
So yes, that WILL slow you down, but there is a valid reason for it. If that's the reason I have no idea why the others wouldn't be slow. It might just be a I use x at home vs y at work type deal?