ForMicrosoftTeams to work in Chromium Browser, it is required to allow the use of cookies. You can allow the use of all third party cookies in Chromium Browser by disabling theBlock third party cookiesparameter underSessions > Chromium Browser > Chromium Browser Global > Privacy.
You can also configure cookie exceptions while keeping third party cookies blocked through adding a custom policy:
Go toSessions > Chromium Browser > Chromium Browser Global > Custom Setup > Policies.
ClickAddto create a policy.
ForPolicy name, enter:CookiesAllowedForUrls
In thePolicy value field enter the following list of URLs: [[*.]microsoft.com;[*.]microsoftonline.com;[*.]teams.skype.com;[*.]teams.microsoft.com;[*.]sfbassets.com;[*.]skypeforbusiness.com]