When implementing a hybrid configuration of Exchange Server and Office 365, the configuration wizard automatically limits connectivity to the Exchange server by setting address ranges on the receive connector of Office 365 in the on-premises Exchange. If you want the additional security of limiting access to the hybrid server at the firewall level, you can copy the configured addresses into your firewall rule.
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)
Alternatively, if you prefer the following links provide lists of the IP addresses used by Office 365 services.
Exchange Online Protection (EOP):
Forefront Online Protection for Exchange (FOPE)
Various Office 365 services:
As an update to this, please note that this is the behaviour for Exchange 2010 Hybrid. For Exchange 2013 and Exchange 2016 the Default Front End connector is updated to use certificate authentication and TLS for connectivity with O365. No new connector is created and there is not list of IP address restrictions. If you want IP address restrictions, then you need to create your own based on the documentation of IP address in O365 provided by Microsoft.
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