Outlook can connect to a Zimbra server in three different ways:

1. ActiveSync
   • New feature in Outlook
   • Great for mobile devices
   • Syncs mail, contacts, calendars and tasks
   • Server-side message store
2. IMAP
   • Syncs only mail
   • Server-side message store
3. POP
   • Oldest protocol
   • Does not sync
   • Only downloads unread messages in Inbox folder
   • Client-side message store

When working with Outlook accounts, you can use the Control Panel applet Mail to manage Outlook profiles and accounts.

ActiveSync support is relatively new to Outlook. This may become our preferred method, if it works out.

Newer versions of Outlook (2013 & 2016) support the ActiveSync protocol.

Unlike other protocols, ActiveSync can synchronize mail, contacts, calendars and tasks.

Sometimes it is best to create a new Outlook Profile, then add an account to the new profile.

From Windows Control Panel → Mail:

1. E-Mail Accounts → New
2. Select Manual setup
   1. Click Next
3. Select Exchange ActiveSync
   1. Click Next
4. Modify the settings as per the image
   • User name is full e-mail address
   1. Click Next
5. Close the test window
6. Click Finish

From within Outlook:

1. File → Account Settings → Account Settings again
2. Select the Zimbra ActiveSync account → Change
   • User name is full e-mail address

Microsoft Outlook support for the standard IMAP protocol is much improved in newer versions (Outlook 2013, Outlook 2016 and newer).

DO NOT make any spelling errors! The vast majority of problems come from spelling errors.

If you find yourself struggling to get a new account working, delete the account completely, then restart Outlook and try again.

From within Outlook:

1. File → Account Settings → Account Settings again
2. Select the Zimbra IMAP account → Change
3. Modify the settings as per the image
4. Select More Settings → Outgoing Server (tab)
   1. Select My outgoing server requires authentication
   2. Select Use same settings as my incoming mail server
5. Select Advanced (tab)
   1. Modify the settings as per the image

http://smallbusiness.chron.com/connect-zimbra-calendar-outlook-60726.html

Tested on Outlook 2013 using EAS (Exchange Active Sync) and should be same for 2016. Outlook version must be 2013 or higher.

First you must share a calendar in Zimbra

• Log on to your Zimbra account with a Web browser and then click the Calendar tab on your dashboard.
• Right-click any calendar under this pane's Calendar's heading and click the Share Calendar command.
• Configure the share settings appropriately for your application.

After the calendar is configured correctly and tested copy the URL to be used in Outlook.

• Log on to your Zimbra account with a Web browser and then click the Calendar tab on your dashboard.
• Right-click the shared calendar under this pane's Calendar's heading.
• Under the URL section right click the URL next to Outlook and select Copy link location“ Add the Calendar to Outlook * Open Outlook and click the File menu's Info command to display buttons for configuring accounts. * Click Account Settings then Account Settings. * Click on the Internet Calendars” tab then the New button.
• Paste the copied URL into the location field using Ctrl V and click Add.
• Edit the Folder Name as desired and click OK then Close.
• Under Calendars Other Calendars tick the box next to the shared calendar.

Download: https://mail.yourdomain.com/zimbra/downloads/index.html

User Guide: https://www.zimbra.com/docs/ne/8.6.0/zcs_connector_for_user_guide

Admin Guide: https://www.zimbra.com/docs/ne/8.6.0/zcs_connector_for_outlook_guide

The connector will run on various versions of Windows and with various versions of Outlook, but you should check before installing. See the first pages of either manual.