Exchange HMA

Question

Hello

I have Exchange 2016 and I have ADFS and MS Teams.

I have configured HMA and working perfectly with Exchange 2016 , Also out calender synced with MS Teams.

I have no mailboxes hosted on Office 365 and all mailboxes on-Prmise

Do i still need to allow the below ports:
https://learn.microsoft.com/en-us/exchange/hybrid-deployment-prerequisites#hybrid-deployment-protocols-ports-and-endpoints
https://learn.microsoft.com/en-us/microsoft-365/enterprise/urls-and-ip-address-ranges?view=o365-worldwide

I already ran the Exchange hybrid Wizard and the HMA working fine but do i need to leave all the Endpoint between My Exchange onprimse and Exchange online allowed.

what is the required ports in my case should be allowed ?

Is it mandatory to Exchange hybrid configuration to do HMA?

Answer 1

Yes, ensure those required ports and open and you must use classic Hybrid to be supported:
https://learn.microsoft.com/en-us/microsoft-365/enterprise/hybrid-modern-auth-overview?view=o365-worldwide