Update Set-CsTeamsMeetingPolicy.md

Author: kpyapali

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

@@ -1024,9 +1024,12 @@ Accept wildcard characters: False
 ```
 
 ### -CaptchaVerificationForMeetingJoin
-
 Require a verification check for meeting join.
 
+Possible values:
+- **NotRequired**, Captcha not required
+- **AnonymousUsersAndUntrustedOrganizations**, Anonymous users and people from untrusted organizations
+
 ```yaml
 Type: String
 Parameter Sets: (All)