How to synchronize a CalDAV calendar or CardDAV address book with Outlook in 5 steps

cFos Outlook DAV operation

When you start Outlook, cFos Outlook DAV tries to synchronize all data of your Outlook folders with the CalDAV/CardDAV server. If something on the server has changed, the changes are reflected in your Outlook folders. So data added or modified on the server will be added or modified in your local folder. Data deleted on the server will be deleted in your local folder. This synchronisation is done every n minutes depending on the sync interval you specified in the folder setup.

Whenever you add, change or delete an event in your local folders you can update the server data by using the "Sync All" button in the ribbon. You should consider doing the same before closing Outlook.

The folder configuration data is stored in the directory C:\Users\YOUR_USERNAME\AppData\Local\cFos\outlook_dav. The directory C:\ProgramData\cFos\outlook_dav contains folder_setup.hta, so you can later change your configuration. Passwords are stored with a preceding "!" and encrytped on-the-fly as soon as cFos Outlook DAV needs them. In C:\Users\YOUR_USERNAME\AppData\Local\cFos\outlook_dav you can also find a file trace.txt with a log of the last recent sync operations.

cFos Outlook DAV uses the Internet Explorer's proxy settings. You can change them in the Control Panel -> Network and Internet -> Browser Settings.

To ignore SSL certificate error messages you can set the value ignore_ssl_errors = 1 in the Windows registry key HKEY_LOCAL_MACHINE\SOFTWARE\cFos\outlook_dav.

To solve problems with UTF-8 encoded vCards set File -> Options -> Advanced -> International options -> Preferred encoding for outgoing vCards to UTF-8.