Cheat sheet with all Ports and rules needed for a Exchange Hybrid Infrastructure

Exchange Hybrid Ports

Sometimes I come to clients who already have a hybrid exchange configured environment. In many cases this is when the hybrid configuration does not work. To make things easier for myself, I created an overview that eliminates the pain of firewalls and networks.

To help you guys out in these situations i share my ports overview document with you, The document is mentions as a cheat sheet this means that you can adjust it and present it to the customers network team.

Overview

There are always some requirements.

  • External IP for a seperate Hybrid flow that resolves to hybrid.domain.nl
  • You need to be sure that the hybrid server is part of the mail environment
  • The Exchange server which is used for the Hybrid configuration needs to be in the LAN
  • Do NOT forget the Exchange online and Exchange online protection URL’s
  • If you do not have an external IP use the external IP of the autodiscover.

 

 

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