Update Set-CsTeamsMeetingPolicy.md

Add documentation to disable meetingChatEnabledType

Author: sjobalia07

teams/teams-ps/teams/Set-CsTeamsMeetingPolicy.md

@@ -1426,6 +1426,11 @@ Default value: None
 Accept pipeline input: False
 Accept wildcard characters: False
 ```
+#### Note: Due to a new feature rollout, in order to set the value of MeetingChatEnabledType to Disabled, you will need to also set the value of LobbyChat to disabled.
+ 
+#### Disable MeetingChatEnabledType command: 
+Install-Module MicrosoftTeams -RequiredVersion 6.6.1-preview -Force -AllowClobber -AllowPrereleaseConnect-MicrosoftTeams Set-CsTeamsMeetingPolicy -Identity Global -MeetingChatEnabledType Disabled -LobbyChat Disabled
+
 
 ### -MeetingInviteLanguages
 Controls how the join information in meeting invitations is displayed by enforcing a common language or enabling up to two languages to be displayed.