Try Pidgin with the excellent ms teams plugin: https://github.com/EionRobb/purple-teams https://github.com/EionRobb/purple-teams - less than 100mb ram usage and

Try Pidgin with the excellent ms teams plugin: https://github.com/EionRobb/purple-teams https://github.com/EionRobb/purple-teams - less than 100mb ram usage and notifications that still work after an hour. Only for (video) calls you need to open teams..