Agreed - this would be amazing to have. We have drastically different schedules based on our techs' own schedules, and each has different working hours defined in Outlook. Currently, each tech has to manually block off all the time they don't want available on Timezest. Here's a screenshot of the Outlook setting OP is referring to.

Are you suggesting the ability to connect customer 365 tenants to our main Tz instance so that the Tz scheduling tool can read availability of clients calendars to help it suggest mutually workable times

I need this Now!