Two Stakes One Building Calendar

We have a ward in my Stake that meets in a building assigned to another Stake (recent reorganization of Stakes). The Ward in my Stake can't see or schedule events in their building online because it's not listed as a building for our Stake. How can this be resolved so they can use the Online calendaring effectively?

You need to talk to a stake administrator in the agent stake for that building (the stake clerk would be a good choice) and ask him to add that ward and your stake as units assigned to the location.

See the About Locations topic in the Calendar help, specifically the section on "Locations and Resources Shared by Multiple Stakes."