How to share contacts with others in Office 365?
It is possible to share contacts in Office 365, however available options are limited as compared to calendar sharing.
A major downside is that contacts folder sharing is not possible in OWA. To share your personal contacts you have to use MS Outlook. The process is pretty straightforward:
1. In Outlook, select a contacts folder you would like to share and right-click it.
2. In the context menu select Share then Share contacts.
3. The sharing invitation pops up. In the To… field type in names or emails of users you would like to share your contacts folder with. You can also enable these users to edit contents of the shared folder – to do so simply mark the Recipient can add, edit, and delete items in this contacts folder option below
4. Below you can enter a short message if you wish.
5. Click Send.
All selected in the invitation recipients receive a new message with the Open this Contacts Folder button on top. Once they click it – new contacts folder appears in Shared Contacts section of the People pane. The folder is named after the user who shared it.