Halo 5 Ban

If you are banned this message will appear "At least one player in your fireteam is banned from playing Halo 5: Guardians"

This error occurs if one or more players in your fireteam (including yourself) is currently banned from playing Halo 5: Guardians. Players can receive bans automatically by leaving games in-progress, killing allied players, and more. Players with bans should
wait and retry at a later time when their ban has been cleared.

If you have been banned by 343 Industries, you'll see a message when you launch Halo 5: Guardians indicating that there is an enforcement in place. You can also check if there are any Xbox enforcements against your account by signing in at the Xbox Policy
& Enforcement site:

http://enforcement.xbox.com/

This is an in game suspension not a violation of the Xbox code of conduct.

You would need to post in the following forum for your in game suspension

https://www.halowaypoint.com/en-us/forums/e0d9938206f04a598ce84f2c8cadce02/topics/the-official-halo-5-why-was-i-banned-thread/19fa6556-e0b1-4248-b817-b3a99d0af5bf/posts

This connection is too slow to play halo 5 multiplayer. Try hardwire from router to xbox or u will keep receiving the Ban Hammer!

You could possibly try contacting your internet provider, and inquire about your internet speed! Or there could be too many people on the internet at once, which will slow internet speeds!

Thx ,I wrote a post there too.