Hi,
No,if your using teams you would have to add the user to all teams. However, you could just set all the accounts to be owned by everyone which would then allow all users to view all accounts.
Regards, Adam Travers
Add a new team, give it a profile of ReadOnly. Add all the users to this team. Then, add this team to any other team (teams within teams!) and they will then get R/O Access. Then, you only have to manage one team of users.
Mike