What are they gonna switch to? I'll bet it ends up being a fork of Zoom or Teams. It's all just theater.
Aynthing that doesn't terminate in USA where it will be used for industrial espionage by Trump, and cut off as soon as USA's regime finds it useful to do so -- like to prevent reporting of the invasion of Greenland, say. European governments are using Microsoft, that's just not safe with MS paying fealty (and literally paying in $dollars) to a fascist regime.
It is unconscionable to maintain the status quo of using USA-based service companies.