Can I be banned for spam messaging a friend or spam inviting

Spam does violate the rules so you can get suspended for that.

Hi Lance,

Thank you for posting in Microsoft Xbox Community. I'm sorry to hear that your account got suspended. For complete information about the reason why your account got banned, kindly check your email. All the details regarding your suspension should be included in that email.

If you think that this is just an error and you want to file a dispute, please visit this link and sign in using the Gamertag of the banned account:

https://enforcement.xbox.com/

You should see a large, yellow hammer icon if the account has been banned. Clicking on that hammer will give you all the available options to resolve your situation.

https://support.xbox.com/en-PH/help/family-onli...

Please note that in this public community forum, we are players like you trying to help and guide other players. This means that we do not have access to other accounts or access to other users' information.

Regards,

Alvaro

What if their friends are in there they can just spam party invite

Doesn't explain why I'm banned without doing anything inappropriate. No swearing, nothing that should get you banned. Literally told him to stop spamming because its harassment and then I suddenly couldnt send my friend a message and he was still spamming
me

I'm thinking the OP was spamming people with boosting lobbies, clan invites or things like that.. because who messages randoms they play games with? The only messages I got from randoms were spam.