Forum Discussion
Inbound Exchange hybrid URLs
Hi Community, For inbound traffic from EXO to EXCH in a hybrid deployment, other than port 25 for mail delivery, the only other inbound traffic required is for outlook.office.com and outlook.office365.com on TCP 443 to connect to EXCH for autodiscover and EWS/MRS?
Hi Northerly
you will need to allow below in firewall URL so Client can connect
Office 365 URLs and IP address ranges - Microsoft 365 Enterprise | Microsoft Learn
For Exchage Server
TCP 443 (HTTPS) for outlook,OWA,ActiveSync,EWS,MRS (Migrations)
TCP 25 (SMTP) for mail flow
if you d0n't want to open port in you Firewall to exchange server you can deploy Hybrid Agent (Built on Azure App Proxy Technology)
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- Hi Recep, thanks for the response. I'm aware of the O365 URLs and the Hybrid deployment protocols, ports, and endpoints doc, however it just says Exchange Online Endpoints. Those EXO endpoints I believe are outlook.office.com and outlook.office365.com. Hybrid Agent will not be used.
Hi Northerly
there is also
*.outlook.com,*.protection.outlook.com,*.mail.protection.outlook.com
if your firewall support rest API you can configure it will do all requires for you.
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Appreciate your Kudos! Proud to contribute! 🙂
