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How did you publish
your calendar to others?
In general, after we
publish our calendars to Internet, other users can access our published
calendar information with the published link from a web browser.
Base on the current
situation, I would like to suggest you try to stop this publishing and
re-publish your calendar to others with the step-by-step instruction suggested here.
In addition, please make sure the recipient can access Internet.
recipient only have the view permission to the published calendar. So, if
you want to the recipient can edit your calendar, you need to share your
calendar. For more detailed information, please refer the link below:
Once I published th calendar I sent them the link so that they can add it to the client. Thus having my calendar sisde by side with theirs.