Navigation panel > Relationships > Cards
Search for and select the customer card
click on tab Contacts
Add or select the contact
Make sure the contact is set as follows:
They must have a Full Name (first and last name)
They must have an Email Address
They must have a Phone Number
They must have a Job Description
They must have a Role
They must have either Accounts Payable or Purchasing Officer ticked (flagged)
All other fields are optional and can be filled in if you have those pieces of information.
Once you have made sure the above is filled in, then click on the button Save
Then select the contact and click on the button Send Contact To Web