This policy setting manages the Office Feedback Tool (a.k.a. Send a Smile). The Office Feedback Tool allows users to provide Microsoft feedback regarding their positive and negative experiences when using Office.
If you enable this policy setting, the Office Feedback Tool will be turned on in all Office applications in which the tool is available. They can access the tool through the Smile button located in the top right corner of the Office application.
If you disable this policy setting, the Office Feedback Tool will be turned off. Users will not see the Smile button in any of the Office applications in which the tool is available.
If you do not configure this policy setting, the behavior is the equivalent of setting the policy to "Enabled".