[ParetoOptimal]

> If Outlook is your company's email provider... the third parties are the concern of your IT department.

Still your concern given whatever information is shared about you and your job to the 766 third parties.

[cferry]

This. There's a choice regarding data identifying you that's made by someone who's not you.

I'm also thinking of 2FA things many corporations mandate, requiring the use of a phone number, application or both, without them handing you a work phone. Under no circumstances will I give my personal phone number to Google or Microsoft because I don't want them to link my work and personal stuff. Right now, I'm locked out of a corporate account at Google due to such refusal.