In Cloud Office Mail, in the Calendar section, select the blue «Add a new calendar» link in the calendar tree on the left, then «Subscribe via URL (iCal)». Now enter the iCal URL of your Google Calendar.
You can find the iCal URL in the settings of your Google Calendar: «Settings for my calendars» > Select the desired calendar > «Integrate calendars» > «Private address in iCal format».
With «Subscribe» the calendar is now added and displayed in the calendar structure on the left. Sometimes it takes a few minutes until all appointments are loaded correctly.
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