We have previously explored the implementation of DLP and Supervision policies to the Team. We will now look at applying Sensitivity Labels - currently in Public Preview. By definition, Sensitively Labels allow Teams admins to regulate access to sensitive organizational content created during collaboration within teams. In other words, it can keep Teams private (removing the ability to be set as public) and block Guests from being added. The best thing is that labels can be set at a tenant label and easily applied when creating the Team. It gives administrators so much more control over the Team in terms that users cannot simply join the Team and Owners cannot simply add guests which are not authorised to access it's content. It's another layer of protection which should be added in any Teams roll-out. It's also an answer for blocking guest access on a Team by Team basis: this works well if the creation of Teams are regulated.