Update Add-VivaModuleFeaturePolicy.md

Updated the version of the release for the new parameter.

Author: knovichenko

exchange/exchange-ps/exchange/Add-VivaModuleFeaturePolicy.md

@@ -251,7 +251,7 @@ Accept wildcard characters: False
 ```
 
 ### -IsUserOptedInByDefault
-This parameter is available in version 3.8.0 or later of the module.
+This parameter is available in version 3.8.0-Preview2 or later of the module.
 
 The IsUserOptedInByDefault parameter specifies whether user opted in by default by the policy. Valid values are: