Detects when a user attempts to upload an item to a restricted service domain or access an item through a browser. If they are using a browser that is listed in DLP as an unallowed browser, the upload activity will be blocked and the user is redirected to use Microsoft Edge . Microsoft Edge will then either allow or block the upload or access based on the DLP policy configuration So if unallowed browser is NOT configured you can use chrome/etc with impugnity anc won't be kicked over to edge which observes the DLP policy, in other words, sometimes can upload (chrome), sometimes can not (edge).