You can try having her fill in "Membership Email" and "Mobile" in the ldsaccount.lds.org. It will go to more places than just the calendar, but that may not be a big deal.
But first you might want to verify that the Building Scheduler can do what you think they can. If you're thinking about the old model where one person schedules multiple units in a building - that doesn't work. At least not without bastardizing the calendar system from what's intended. If it's just a single unit, then Building Scheduler rights aren't really needed. It's calendar editing rights that will do the job.
Have you searched the
Help Center? Try doing a Google search and adding "site:churchofjesuschrist.org/help" to the search criteria.
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