1) I always recommend to my friends to give Cortana more than a 5 second consideration - especially if they're Windows users. Since Cortana primarily uses Bing, there's always a hesitation - but it's surprisingly fun and an effective AI "assistant." I'm still working on understanding the Office 365 capabilities, as I discover some cool ones here and there Example that blew away a colleague at work using a Surface Pro…
I've really wanted to try Cortana since getting a Windows 10 laptop, but it won't let me turn it on without giving full access to search, email, credit card no, SSN, calendar, etc. Oh well. Why do I need to give it access to my search history and email to be able to find excel functions for me?
You should think of your personal data as a valuable asset that you can use to pay for things. Now you know why you need to give Cortana access to them.