The ProtonMail people are accusing Microsoft’s new Outlook for Windows app of conducting extensive surveillance on its users. It shares data with advertisers, a lot of data:
The window informs users that Microsoft and those 801 third parties use their data for a number of purposes, including to:
Store and/or access information on the user’s device
Develop and improve products
Personalize ads and content
Measure ads and content
Derive audience insights
Obtain precise geolocation data
Identify users through device scanning