Windows 10 warns you you'll need a new app and tries to take you to the Store -- but GigJam isn't a Store app.
You can sign into GigJam with a Google, Microsoft or Office 365 account.
GigJam gives you some hints about the interface when you first open it, but not when you're using it.
You can add sources from the hamburger menu.
There's limited help within GigJam: you can speak or type what you want to do in order to access shortcuts to services.
When you select a service, you can see what permissions GigJam needs.
Here are the permissions for connecting to Office 365.
You can add cards from the pane of services.
You can't change the size of cards or move them closer together.
To share a card, you select it and then draw crosses through paragraphs you don't want to share.
Complex HTML email doesn't display well.
You use two fingers to scroll -- swiping with a single finger draws on the card instead.
Use a two-finger scroll to choose which slides to share in a presentation.
Outlook.com never found any contacts; Wunderlist would sometimes say it was disconnected.
Select two cards and you can link them by mapping fields.
GigJam only works when you're online.