This article will show you how to add an external mailbox to the Zimbra Web Client.

1. Using a web browser, navigate to and log into the desired mailbox. 

2. Select the Preferences tap.

3. Under the Preferences Panel, select Accounts. Under Accounts, select the Add External Account button.

4. You will need to acquire the settings for the account you are adding. Once you have completely filled in all fields, select the Test Settings button.

5. The configuration will attempt to authenticate to your settings. Once the connection is established, a notification showing you the account status to be a Success, will appear.Press OK to continue back to the mail page and view the external mailbox. Depending on the size of the mailbox, it may take a few minutes to load.