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Create a Content Switch Policy expression to allow inbound Office 365 traffic by using the Office 365 Service URL's instead on the Office 365 IP address


Paul Dimas

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Hi Guys,

 

Is it possible to create a Content Switch Policy expression that can be used to allow inbound Office 365 traffic by using the Office 365 Service URL’s instead on the Office 365 IP address?

 

Some of the Office 365 Service URL’s include "outlook.office.com" and "outlook.office365.com" as per https://endpoints.office.com/endpoints/worldwide?clientrequestid=b10c5ed1-bad1-445f-b386-b919946339a7 

 

My current content switch policy currently includes the Office 365 IP address ranges but as they are updated every month I need to frequently update the policy.

 

Example:

HTTP.REQ.URL.PATH.TO_LOWER.CONTAINS("/ews/") && CLIENT.IP.SRC.IN_SUBNET(13.107.6.152/31) || CLIENT.IP.SRC.IN_SUBNET(13.107.9.152/31) || CLIENT.IP.SRC.IN_SUBNET(13.107.6.152/31)

 

Note: This is part of an Exchange Hybrid configuration where there is a requirement to reverse proxy Exchange Web Services (/ews/*) as per https://www.allabout365.com/2016/08/using-the-office-365-hybrid-configuration-wizard-part-2/ , section for reverse proxy requirements reads "Exchange Web Services must be published to the Internet, or as a minimum the Office 365 IP address ranges."

 

Thank you,

Paul Dimas

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