RE: Unable to download Dynamics GP 2018
Going to answer this one myself.
Need to click on the "Skip" button when this login prompt comes up after clicking on the download link. Don't just blindly re-login with the microsoft account credentials...this login is different. Must read the note at the bottom of the dialog!

I seldom login to the dynamics support site...only about once a year or so, when ever I need to get the year end update or upgrade dynamics gp. Trying to log in with my personal microsoft account, won't work here since it's not a dynamics account.
I spent way too much time trying to figure out why this wasn't working.
Also ran into an issue where I couldn't post questions to this forum. Always got a "Sorry we could not find the requested page." error after clicking on post. Must be something with either Chrome or the ublock origin extension perhaps. Using Edge to post these for the time being.
Hope this helps someone in the future or at least myself next year