In Feng Office there are users on one hand and contacts on the other hand. Both relate to people, but there a some important differences you should know.
Contacts are basically addresses (including all information that is necessary to contact a person by phone, fax, or the Internet). Contacts are stored under the
Contacts tab, and as a whole they represent the address database within your Feng Office installation.
Users are basically logins for a Feng Office installation (including the e-mail address that is used to send a user information by e-mail). Users are managed by a Feng Office administrator in the administration panel. Users have certain user rights which may differ in many ways (for more details read understanding user rights).
If you have a contact that is not linked to a user you can do so by clicking the action
Create user from person in the detail view of a contact.
If you get the following error message your contact has no company assigned (which is mandatory for users). Simply edit the contact and add a company to solve this issue.