[kuerbel]

20/40/70 GB of outbound data is included, depending on the tier.

But you need to meet pretty high licensing requirements, e.g. for enterprise:

Microsoft 365 Business Premium, Microsoft 365 F3, Microsoft 365 E3, and Microsoft 365 E5, including versions of these suites that do not include Microsoft Teams, as well as Microsoft 365 A3, Microsoft 365 A5, and Microsoft 365 Education Student Use Benefit.

Which means around 20€ per month for business premium. They are also managed in intune, so you need someone with intune expertise.

[onion2k]

And InTune needs user's to put Edge on their devices, which means a significant set of users will just give up being able to open links on their phone from work apps. That puts a drag on productivity which is definitely more costly than 20€ per month.