I have some queries about O365 ExpressRoute and GeoDNS
1) Assuming ExpressRoute premium SKU is not involved, If my end user in Singapore has O365 tenant in-country but their only Internet breakout is in France (hypothetical), should they use ExpressRoute location in Europe or APAC ? I assume the former is right
due to GeoDNS
2) Apart from Exchange online, what other O365 application has such GeoDNS dependency that could influence the ExpressRoute location ?
3) For those O365 application that has no GeoDNS, is the Tenant country the factor that determines the ExpressRoute locations ?
4) Adding back ExpressRoute premium SKU, if my global network has both ExpressRoute US and APAC with premium SKU, what BGP attributes on O365 prefixes advertised from Microsoft peer will allow our routers to make sure US office using ExpressRoute in US and
Singapore office using ExpressRoute in APAC ?
5) Where are the links that cover the above information
Regards,
Keith