Configure Your Exchange Service Account for GoTo Room Calendar Integration
Admins can set up an Exchange Server service account using the Exchange Management Shell or the Exchange Admin Center. The service account must be created before connecting a calendar in the GoTo Admin Center (classic).
Configure a service account with the ApplicationImpersonation role (admins only)
Create a room list and add room resources (admins only)
Admins must add the rooms resource they want integrated to a rooms list.
Warning: You cannot create room lists from the Exchange Admin Center. This must be done using the Exchange Management Shell.