2026-10-27 19:25 UTC
Replies (2)
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@balsoft@lemmy.ml 2026-10-27 19:32
all i can say is that i need to log into outlook to log into teams, because logging into teams directly is broken, but the cross site cookie work… Thankfully I don’t even have an MS account, but I do implore you to check out the cookies and see for yourself that they will have a specific list of domains they are valid for. Open the browser developer menu on an Outlook tab (F12), navigate to “Storage” → “Cookies” (may be named slightly differently in different browsers), and look at the “Domain” column in the table.
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@trxxruraxvr@lemmy.world 2026-10-27 19:48
This works because loggin in to outlook sets a cookie for login.microsoftonline.com which is reused by other Microsoft products. Each product requests a token from login.microsoftonline.com and as long as you have a valid cookie for that domain it will return a token that the app (outlook/teams/onedrive/etc) can use to access its own api. The cookie itself stays bound to login.microsoftonline.com and it’s never shared with other domains and the service at login.microsoftonline.com will not provide tokens to requests from non-microsoft domains.