New Office 365 IP/URL tables published


Microsoft has IP Address and URL information for Office 365 in a variety of formats including HTML tables, XML download file, RSS feed, and others. The data is needed in scripts and network devices and that is best served by web services rather than web pages and we're working on a larger project to validate and publish this data through web services. We're replacing these publishing points and focusing on REST based web services. It will continue to be possible to get HTML and RSS formats of the data. We are adding attributes to the web services output including a required attribute, an ExpressRoute attribute, and a network endpoint criticality category attribute. All of this is expected to result in simpler and faster network connectivity onboarding for Office 365 and fewer customer concerns with the data. This project is described at


As a part of this project on Tuesday August 21st, 2018 we migrated the HTML tables of IP Addresses and URLs for Office 365 to a new publishing platform. The new pages are generated from our web services automatically and look a little different to the old ones. Any links to the old pages will automatically redirect to the new ones.


FAQ on the new IP Address and URL page publishing:

  1. What pages are being migrated?
  2. What is this data used for?
    • Office 365 enterprise customers who have multiple office locations commonly have wide area networks connecting those office locations and perimeter networks that control and secure Internet connectivity. Office 365 requires favorable network connectivity and we publish IP Addresses for customers to use as ACL lists in their firewalls and we publish URLs for customers to use for security device bypass in proxy servers. Many customers automate the update of their devices from this data and load the changes every month.
  3. Where does the new generated table date come from?
  4. Did the IP/URL endpoint data change with this new publishing?
    • The data is the same. We have been publishing changes to the pages from the web services for the past several months in preparation for this change.
  5. What notice was provided about these changes?
    • The blog post describing these changes was first published on April 1st. Customers have been notified of the change in Message Center post MC133236.
  6. Where are the detailed descriptions of URLs and IP Addresses from the previous published page?
    • We are working to simplify the publishing to just what is required to configure network perimeter devices. As such many of the network endpoints can be now directed to default Internet egress locations. Detail about endpoints that are in the “Optimize” and "Allow" categories and require special networking consideration is available for customers who need this under NDA. The mapping of the old product list to the new service areas is listed in our migration article here:
  7. What other IP/URL publishing is changing?
    • The XML data files will be deprecated on October 2nd. The RSS feeds will be replaced with a new RSS feed and the current one will be discontinued.
  8. How can I find out details about a specific IP Address or URL used by Office 365?
    • You can search in the new web pages or search the output of the web services with your own script.
  9. When will the new web services be out of preview and officially supported by Microsoft?
    • The data published is production data and we are treating any schema or interface changes as production breaking so you can start working with the web services now. We are still working on production support and GA for the web services which is coming within a couple of months and will be prior to October 2nd.







1 Reply

@Paul Andrew- as RSS feed will be replaced by new RSS feed so the URL of RSS feed also change or it will be the same as it is currently- ?