Update Set-CsTeamsAcsFederationConfiguration.md

Adds identity parameter

Author: jamescadd

teams/teams-ps/teams/Set-CsTeamsAcsFederationConfiguration.md

@@ -80,6 +80,22 @@ Accept pipeline input: False
 Accept wildcard characters: False
 ```
 
+### -Identity
+Specifies the collection of tenant federation configuration settings to be modified. Because each tenant is limited to a single, global collection of federation settings there is no need include this parameter when calling the Set-CsTenantFederationConfiguration cmdlet. If you do choose to use the Identity parameter you must also include the Tenant parameter. For example:
+
+`Set-CsTenantFederationConfiguration -Tenant "bf19b7db-6960-41e5-a139-2aa373474354" -Identity "global"`
+```yaml
+Type: String
+Parameter Sets: (All)
+Aliases:
+
+Required: False
+Position: Named
+Default value: None
+Accept pipeline input: False
+Accept wildcard characters: False
+```
+
 ### CommonParameters
 This cmdlet supports the common parameters: -Debug, -ErrorAction, -ErrorVariable, -InformationAction, -InformationVariable, -OutVariable, -OutBuffer, -PipelineVariable, -Verbose, -WarningAction, and -WarningVariable. For more information, see [about_CommonParameters](https://go.microsoft.com/fwlink/?LinkID=113216).