Exchange multi tenant calendar sharing

[Curious_Kevin16]

Hi Exchange Brian Trust, 

I have 3 separate Exchange Online tenancies (all Hybrids) across different countries which I would like to connect for Calendar Free/Busy sharing. In the main tenant, we are using a SRV record for Autodiscover DNS publishing due to the number of domains being used (about 50 domains). 

My question is, what's the best way (knowing that we now have Multi-tenant capability too) to interconnect these 3 tenancies for Calendar sharing? Would this SRV record be a problem for this connection ?

Thanks you and appreciate your inputs ! 

Kev

[#2]

For tenant-wide sharing, configure org relationships: https://learn.microsoft.com/en-us/exchange/sharing/organization-relationships/create-an-organization...
SRV should not matter, as long as it's externally published/other tenants can resolve it.

[#3]

Thanks so much @VasilMichev for the quick turnaround !

If we think a bit ahead, can Multi-tenancy approach provide the same? we're interested on Multi-tenancy as we may be able to leverage its other capabilities as well in a later stage so its a win win. Can multi-tenancy facilitate calendar free/busy sharing ?

Thanks again !

[#4]

If you are referring to the Multi-tenant organization feature, it does not enable anything on Exchange side currently.