anonymous user Welcome to Microsoft Q & A Community Forum. Kindly note below are the list of regions that support availability zones. If the source location is not selected among the list of availability zones, then you will be prompted with error "Disaster Recovery between availability zones is not applicable for the selected region as there are no availability zones".
Canada Central and Canada East belongs to same geography as Americas. When the region of the Recovery Services and source region belong to same geography, you will be prompted with a warning "The region of the Recovery Services vault is the same as the source region. If you are protecting machines across zones and not across regions, you may continue. For cross-regional DR, please select a vault from different region". You can choose source region from another geography for cross regional DR or you can choose to ignore.