Updating google calendar from outlook
The longer the refresh rate, the less up-to-date your calendar will be.
For quite a long time if you set up an appointment on your Google calendar, it would sync up automatically with your Outlook calendar, meaning that same appointment would show in both calendars without you having to manually do it yourself.
Click Finish, then select the date range of the calendar you’d like to export and click OK.
Configuring i Cal to access your Gmail calendar and then syncing Outlook to i Cal enables you to give Outlook for Mac direct access to your Google calendar entries.
You can use the stock calendar, S-Planner on Samsung phones, HTC Calendar on HTC, or Google Calendar's official app to test this.
If they work and Digi Cal don't - please send us an email with the details. Check the sync status of the phone and account, they must be all enabled to allow syncing.
Afterwards, the Android calendar synchronization system will upload the changes to your calendar server (Google Calendar, or Exchange).
But sometimes your device can experience a sync error, leading to problems with uploading and refreshing your calendar data.