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  • Derrick Marshall thinks this is interesting:

It is important to think about external sharing as part of your overall security planning for SharePoint Online. You may want to create a special permissions group to which external users are assigned when they receive invitations to be sure that you do not “overshare.” You may also want to create separate site collections that are used only for collaboration with external users so that you can allow external users to access specific content without opening up the entire environment. Remember that in all cases, your goal is to balance the ease of getting work done with trusted external partners with minimizing the governance “sharp edges” discussed in Chapter 4, “


Cover of Essential SharePoint 2013, Second Edition


External Sharing