Profile links are used to establish a relationship between two or more profiles. For example, you might link a guest profile to a travel agent profile or a company profile to several employees. To link profiles:
Locate and open a profile.
In the Profile Overview panel, under the Profile column, click Profile Links. You may need to select Show All to expand all options.
Click New.
Select the Profile Type, Type of Profile Link, Related Profile, and if applicable, select the check box for Primary Profile Link. Setting a profile link as primary can be useful when linking several profiles that have the same profile type.