Using the full Office Outlook client on a PC or Mac, you can easily share your contacts with another person in your organization. Opening the a colleagues shared contacts with the Office Outlook client is also simple to do.
However when it comes to using Outlook Web App, the browser based Outlook client, there are some limitations with using shared contacts. The good news is, it can be done. The bad news is, that you cannot client the Email address another persons shared contact and send them an Email directly. This is because when you click the shared contact’s Email, OWA attempts to launch a new Email message Windows in the contact of the person sharing the the contacts. The work around to this of course would be to find the shared contact, and then copy the Email address from their profile, then Compose a New Message from you Inbox and paste the address in the To line. So while, workable its not very convenient.
In order to Open Shared Contacts (you obviously need to have permission to the contacts), first you login to your mailbox in OWA as you normally do. Second, open a separate Tab or Browser windows and type in your custom URL in the following format:
Where server.example.com is the host name used to access OWA (for example: mail.acme.com), and firstname.lastname@example.org is the email address of the shared mailbox (for example: email@example.com). So using the example it would look like this: “https://firstname.lastname@example.org/?cmd=contents&module=contacts”