Account Switcher option in the store profile menu
Key Takeaway
A buyer can't switch accounts until you add the Account Switcher menu item to the store's user profile menu, even when every other part of the setup is done. Set its Type to Modal in newer stores or to Event in older Aura stores, and select Account Switcher in the Event field.
The Account Switcher is a menu item you add to a B2B store's user profile menu. A buyer uses it to switch to an external account, which is an account the buyer isn't a contact for. After switching, the buyer can shop or manage users on that account's behalf.
Who can switch and what they can do
You give a buyer access to an external account by assigning them the Buyer Manager role. When that buyer shops in the store, they can switch to any external account they have access to. At present, the Account Switcher supports only business accounts.
What the buyer can do after switching depends on the privileges you give them. You can let them purchase on behalf of the account. You can also let them add and activate users, reset passwords, and view their shopping carts.