Additional features, settings, or issues not covered by specific Microsoft Teams categories
Thank you Suganya! I was having the same issue as the others who replied here, but after following your instructions in the Settings, I was able to remove the Organization from my list and the alert triangle is Gone from my main TEAMS Header. I can still see the Organization if I go back to Settings-Accounts and orgs.. but that's OK.. It doesn't alert me to an issue anymore which is what I needed.
Thanks again! :)