With membership requests, any Dropbox user with a verified email address on a company domain can request to join a team.
If you created your personal Dropbox with a personal email address:
If you created your personal Dropbox with a business or work email:
If there is a Dropbox Business team on a company domain, Dropbox Basic and Plus users can request to join that team. If there is more than one team on a domain, users can see all available teams, but can join only one of them.
Once a user requests to join a Dropbox Business team, an email request is sent to the Dropbox Business team admin, who can approve or deny this request. If the admin approves the request and the team doesn't have enough open licenses, the team is billed for an additional license.
Dropbox Business admins can also manually approve or deny any outstanding requests in the Members tab of the Admin Console.
As the team admin of a Dropbox Business account, you can determine how members discover and join the team:
If there are no Dropbox Business teams on a company domain name, Dropbox Basic and Plus users can join—or request access to join—any existing free teams through the Team tab. These users can also create a team.
As the admin of a Dropbox free team, you can determine how users are able to join your team: