Update Set-CsCallQueue.md

Author: CLYVR

skype/skype-ps/skype/Set-CsCallQueue.md

@@ -1352,7 +1352,7 @@ Accept wildcard characters: False
 ```
 
 ### -WaitTimeBeforeOfferingCallbackInSecond
-The number of seconds a call must wait before becoming eligible for callback. This condition applies to calls at the front of the call queue. Set to zero (0) to disable this condition. This parameter becomes a required parameter when IsCallbackEnabled is set to `True`.
+The number of seconds a call must wait before becoming eligible for callback. This condition applies to calls at the front of the call queue. Set to null ($null) to disable this condition. This parameter becomes a required parameter when IsCallbackEnabled is set to `True`.
 
 ```yaml
 Type: Int16
@@ -1367,7 +1367,7 @@ Accept wildcard characters: False
 ```
 
 ### -NumberOfCallsInQueueBeforeOfferingCallback
-The number of calls in queue before a call becomes eligible for callback. This conditon applies to calls arriving at the call queue. Set to zero (0) to disable this condition. This parameter becomes a required parameter when IsCallbackEnabled is set to `True`.
+The number of calls in queue before a call becomes eligible for callback. This conditon applies to calls arriving at the call queue. Set to null ($null) to disable this condition. This parameter becomes a required parameter when IsCallbackEnabled is set to `True`.
 
 ```yaml
 Type: Int16
@@ -1382,7 +1382,7 @@ Accept wildcard characters: False
 ```
 
 ### -CallToAgentRatioThresholdBeforeOfferingCallback
-The ratio of calls to agents that must be in queue before a call becomes eligible for callback. This conditon applies to calls arriving at the call queue. Set to zero (0) to disable this condition. This parameter becomes a required parameter when IsCallbackEnabled is set to `True`.
+The ratio of calls to agents that must be in queue before a call becomes eligible for callback. This conditon applies to calls arriving at the call queue. Minimum value of one (1).  Set to null ($null) to disable this condition. This parameter becomes a required parameter when IsCallbackEnabled is set to `True`.
 
 ```yaml
 Type: Int16