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At the Worldwide Partners Conference 2015 Microsoft demonstrated Cortana integration with upcoming products such as Gig Jam.
Cortana has a built in system of reminders which for example can be associated with a specific contact; it will then remind the user when in communication with that contact, possibly at a specific time or when the phone is in a specific location.
Turning Cortana off does not in itself delete user data stored on Microsoft's servers, but it can be deleted by user action.
Microsoft has further been criticised for requests to Bing's website for a file called "threshold.appcache" which contains Cortana's information through searches made through the Start Menu even when Cortana is disabled on Windows 10.
Cortana on Windows mobile and Android is capable of capturing device notifications and sending them to a Windows 10 device.
This allows a computer user to view notifications from their phone in the Windows 10 Action Center.