From time to time, we update the URLs and IP addresses that our services use. This happens as a normal course of business (deploying new services, adding new capacity in datacenters or regions). If your organization is trying to filter network traffic, you need to make sure you are allowing your users to these services. We publish a feed that contains these updates. One way to keep up-to-date is by subscribing to the feed in Outlook.
- File > Account Settings
- Select the RSS Tab
- Click New and enter the feed URL (https://support.office.com/en-us/o365ip/rss) and click Add.
- Click Change Folder.
- Select an appropriate folder and click OK. I drop mine in the Inbox.
- Click OK.
- If you left it as the default feed name, you can enter From:”Office 365 URLs and IP Addresses” in the mailbox search bar.