I doubt that Microsoft will allow OpenAI to train on teams data from other businesses.
They are fine with tons of telemetry and candy crush ads on the start bar. There were also other instances were Microsoft shared data before Google.
In addition to that, one could argue they already share date from businesses source code with copilot.
Teams has 270 million monthly users (you can Google it, I'm looking at a geekwire post) and Google has 2 billion monthly g suite users (business insider)
They are fine with tons of telemetry and candy crush ads on the start bar. There were also other instances were Microsoft shared data before Google.
In addition to that, one could argue they already share date from businesses source code with copilot.