CalDAV

With the CalDAV calendar server built in you can connect to the Group-Office calendars with other clients. To do this you must first determine your baseURI. Ideally your webserver is configured with an alias:

Alias /caldav /path/to/go/modules/caldav/calendar.php

In that case the base URI to your CalDAV server is:

http(s)://your.url.to.groupoffice/caldav/

Otherwise it's this:

http(s)://your.url.to.groupoffice/modules/caldav/calendar.php/

The Apple iCal client

Connecting with iCal:

• Go to preferences in the iCal menu
• Go to the Accounts tab
• Press the + button to add a new account
• Select 'CalDAV server' for account type
• Enter your username, password
• For server address, enter the full <baseURI>/principals/<your.groupoffice.username>/. Do NOT forget the trailing slash!

The Evolution CalDAV client

Connecting with Evolution:

• Find your calendar URL at: <baseURI>/calendars/
  

Select your username and then find your calendar.
Eg. for John Smith: <baseURI>/calendars/jsmith/smith-john-1/

• Connecting to a CalDAV server is done through the "New > Create new calendar" dialog. In this dialog it is possible to specify a CalDAV location. (Replace http(s) with caldav)

To setup TODO lists through Evolution works the exact same (select New tasklist instead of calendar).

Thunderbird with the lightning plugin

• Find your calendar URL at: <baseURI>/calendars/
  

Select your username and then find your calendar.
Eg. for John Smith: <baseURI>/calendars/jsmith/smith-john-1/

• In the main menu go to: File -> New -> Calendar
• Select "On the network" in the dialog that pops up
• Enter the URL you found in the first step