You can share your contacts with internal and external partners. Depending on the requirements, different methods exist.
The Global address book provides the contact data for all users. Each user can use those contacts.
To make additional contacts available for internal users or external partners, proceed as follows:
Create a new personal or public folder where you can copy or move the wanted contacts to.
You can also share an existing folder.
If another internal user shared a contact folder with you, you can access this folder in the folder tree.