If you manage multiple clients but want to control access to them independently of the client hierarchy, you can set this individually for a user. You can create users in the main client and from there grant access to the desired clients and set a standard login client.

You can make these settings for a user under Mangement → Companies & Clients.

Select Control client access.

By default, access is set to all clients:

This setting also includes clients that are created in the future.

If you move this check mark, the client tree with your client structure opens. Here you can use the checkbox to mark the clients that the user should have access to as allowed. If you mark the flag on the right , this sets the default client for the user, to which he or she will automatically be directed after logging in.