As you may already know Safe Links is a security feature on Office 365 which rewrites URL’s embedded into emails to check if these URL’s are safe which comes with Office 365 E5 (or if you have bought the add-on Advanced Threats Protection).
Now, Safe Links is coming to Office documents, performing the same ‘on the fly’ rewrite when the user click on an URL embedded into a Word, PowerPoint or Excel document.
To take advantage of this security feature, you need to have the latest Office 365 Pro Plus (ie Click to Run) version and you need to turn on Safe Links for Office from the Compliance portal (https://protection.office.com/) in the Threats Management\Safe links section.
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