Hi,
If I remember right, this is a new feature introduced within 1805 Build using Monthly update channel. Currently, there is no option to revert it to the old detailed permissions. If you relay heavily on this feature, you may consider to revert your Office
2016 to a Build previous to 1805. Or, you can switch to Semi-Annual Channel.
If you have any feedback on the new Outlook Calendar sharing GUI, you can submit it to our product team via the
UserVoice forum.
Thank you for the understanding.
Regards,
Steve Fan
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