What should the group of a user in Linux be to access samba?

I have a friend who works at a business where the IT guy has passed away and I am trying to help them until they can hire someone else. It is a workgroup networked with a Linux server. They recently hired a new employee who is needing access to their file share. I have never used Linux but tried to create a user but he can not access the file share. When he tried to access the server \\server1 he of course can not connect to it. Here is where I'm at so far. I created a user on their server name chris and added him to what I believe are the groups. The user cary is set up correctly and can access the file share so I am trying to copy his access. The following is the id chris and id cary and what I think may be the issue. uid=1010(cary) gid=100(users) groups=100(users),101(cad),1005(samba) uid=1035(chris) gid=1035(chris) groups=1035(chris),100(users),101(cad),1005(samba) I see chris has the first gid of 1035 so I'm assuming it needs to be changed to 100. He then has groups=1035(chris) that shouldn't be there at all? Any help would be appreciated! Thanks!