I dealt with one user for whom this issue was particularly persistent, their status was stuck as ‘offline’ 100% of the time in Teams, but also Teams showed all their colleagues status as ‘offline’ too. There is an amount of information if you search for it online, but I couldn’t find a definitive answer on how to resolve it through my googling. I recently had several instances of users Teams status either being slow to update, or in some cases showing as ‘offline’ or unavailable. This post details a potential issue observed with Teams user status, some considerations and how it the issue was resolved.