How you share and view shared data in the zimbra web client is different than how you share and view shared data using the zimbra connector for outlook. In the web client the share is automatically mounted where in the zco you have to manually mount the share

To share something:

• Right click on a folder and select properties. Select the sharing tab. select a user and select their role. Click ok. The next sync will set the permissions on the folder on the server.
  

• To share a calendar or contacts from Outlook: - Right Click on the calendar or contacts - Select Properties - Click on the sharing tab 
  
  

To access contents that have been shared with you:

• File->Open->Other users mailbox and select the user that has shared a folder with you. A new folder hierarchy will be added for this user and all the contents they have shared with you will be available.
  
• To open a shared calendar or contact from Outlook: - Go to calendars or contacts - click on the "Open a shared Calendar" or "Open a Shared Conacts" link to mount a shared calendar.