@shadowstrider-7 sorry my bad english!
yeah, u can share this game with your family but i just tested, u cant play together.
I did exactly that what u wrote.
i logged in xbox with my wife account.
i started with my account in win10 this game - logged in.
i tryed to start this game same time in my xbox and it says:
"Game in use"
"You're already playng this game on another device. Close that game to play it here. (0x8015c1e)"

that means u cant play same time this game is second device :( u need to buy 2 copys of it

and yeah, i found just this post: here
Can I be signed into the same game on Xbox One and my Windows 10 PC?

At any single point in time, you may only sign into the game on one Xbox One console or one Windows 10 PC. You cannot be signed into the same game on both platforms at the same time.

@cr0n0d Here's what you'll need to do:

1. Purchase the game (Play anywhere title) using your primary Xbox account.
2. On your Xbox One console Go to Settings/Personalization/My Home Xbox and set your console to Home.
3. Add the other Gaming Account to your Xbox, that you want to be able to share with.
4. Log into the Xbox using the other account
5. Log in to your Windows 10 Xbox App with your primary Xbox account that was used to purchase the game
6. Enjoy your gameshared play anywhere title.

This was a quick response. If you need clarification on anything, please tag me again and I will answer the best that I can.

@shadowstrider-7 said in Question about cross play:

@cr0n0d You can, in fact, gameshare between Xbox and PC.

Thanks for the quick reply, you are always very helpful, i did a very (very) quick research on how to do that but didn't find anything, i will look better now, if you have a useful link handy can you share it please? If not don't warry, don't waste time, i will find it :)

Edit: after a better research i have find some info and all where ponting to this blog.

@mlago16 I think if you buy a game no matter what platform you can play on all platforms but I'm not sure

@cr0n0d You can, in fact, gameshare between Xbox and PC.

@logansdadtoo Hi there, thanks for share this info, i was not aware of it. Perhaps you know if is possible to gameshare beetween 1 pc win 10 and one xbox or work just with consoles?

@qm-ginger-beard
That is incorrect information m8!!

@jannu80
Yes 2 people can play at the same time thanks to game sharing, just not with the same profile (obviously!)
Do some research on Game Sharing, it's easy to set up ;)

@jedahorus nope, play anywhere needs to be digital from the MS store

I already posted on how it all works.

https://www.seaofthieves.com/forum/topic/30543/to-clarify-how-play-anywhere-works-if-you-have-one-copy

@mlago16 So this would be a the Play Anywhere feature that allows you to buy 1 copy through the Microsoft or Xbox store respectively and own it on both platforms. Cross Play is the feature that allows both Xbox and PC players to play together.

@qm-ginger-beard thanks!

i bought digital version of this game in xbox and i have in xbox and pc closed beta client. i have question - can i play same time this game - i mean my girl playng in xbox and i play in pc (same time) ?

A little question about the cross-plateform. I want a physic copy of sea of thieves but only play on PC. If i buy a x-box on copy and add it to the x-box insider (if it's possible) can i play on PC? or does a physical copy come on pc? ^^

@cezand alright thanks

I believe if you buy it on PC, you can play it on Xbox and vice versa. And you can play with someone on PC/Xbox if you're on the opposite platform, I know firsthand, due to playing with someone from Xbox for 3 hours today without any problems, it is fairly solid in that manner.