When you are invited as a Buyer :
Unless the invitee has not yet uploaded products, otherwise, you should be able to see products in Product Arrangement and/or Order Managementwhen the invitation process is done successfully. You should be able to see the inviter’s list of products (online product catalogue). If you can not see the product list, please contact the inviter; request the inviter to set a "price category" (if not, you will only see Sample Price) and set at least one of the "Product Categories" to you .
When you invite the Buyer:
When the invitation is made successfully, you can see in the Data Management > Category Setting the new Buyer within the Buyer Group. Please remember to assign the new Buyer a Price Category (if not, new buyers will only see the sample Price), and at least one of the "Product Categories" to the buyer group..