Help a customer with their team without signing in as them. From your own account you can see a child account's users and invitations, invite people, and change or remove users.
In the side menu, select Accounts > Consumers, or Accounts > Dealers for a sub-dealer.
On the account's row, select Manage Users, marked 1.

The account's Users tab opens, with every user and their role.

Select the Invitations tab.
Select Send Invitation, marked 1.

The Send an invite dialog opens.
In Emails (Add up to 20 emails)*, enter the address and press Enter.
In Role, choose the role the person gets in that account.
Select Invite.
The app shows "Invitation sent successfully" and lists the invitation link for each address.
Select Close.
The invitation shows as Pending on the Invitations tab.
The Send Invitation dialog reference describes the dialog.
Use this when the owner of a new account never received or lost their invitation.
On the Users tab:
The steps are the same as for your own account. See Change a user's role or remove a user.