Minor updates to clarify Ex2013 and Ex2016

Author: chrisda

exchange/exchange-ps/exchange/Disable-UMService.md

@@ -16,7 +16,7 @@ This cmdlet is available only in on-premises Exchange.
 
 Use the Disable-UMService cmdlet to set the status of an Exchange Server 2010 Unified Messaging server to disabled. This prevents the UM server from processing UM incoming calls.
 
-You can run this cmdlet on an Exchange Server 2016 Mailbox server, but the target server must be an Exchange 2010 UM server. You can't use this cmdlet to disable the UM service on an Exchange 2016 Mailbox server.
+You can run this cmdlet in Exchange 2013 or Exchange 2016, but the target server must be an Exchange 2010 UM server. You can't use this cmdlet to disable the UM service on Exchange 2013 or Exchange 2016 Mailbox servers.
 
 For information about the parameter sets in the Syntax section below, see [Exchange cmdlet syntax](https://docs.microsoft.com/powershell/exchange/exchange-cmdlet-syntax).
 

exchange/exchange-ps/exchange/Enable-UMService.md

@@ -16,7 +16,7 @@ This cmdlet is available only in on-premises Exchange.
 
 Use the Enable-UMService cmdlet to set the status of an Exchange Server 2010 Unified Messaging (UM) server to enabled. This setting enables the Unified Messaging server to process UM calls.
 
-You can run this cmdlet in Exchange 2013 or later, but the target server must be an Exchange 2010 UM server. You can't use this cmdlet to enable the UM service on Exchange 2013 or Exchange 2016 Mailbox servers.
+You can run this cmdlet in Exchange 2013 or Exchange 2016, but the target server must be an Exchange 2010 UM server. You can't use this cmdlet to enable the UM service on Exchange 2013 or Exchange 2016 Mailbox servers.
 
 For information about the parameter sets in the Syntax section below, see [Exchange cmdlet syntax](https://docs.microsoft.com/powershell/exchange/exchange-cmdlet-syntax).
 

exchange/exchange-ps/exchange/Test-UMConnectivity.md

@@ -16,7 +16,7 @@ This cmdlet is available only in on-premises Exchange.
 
 Use the Test-UMConnectivity cmdlet to test the operation of Unified Messaging (UM) servers.
 
-**Note**: This cmdlet works best in Exchange 2010. In Exchange 2013 or later, the functionality of this cmdlet has been replaced by Managed Availability. For the best results, use the Invoke-MonitoringProbe cmdlet and specify the relevant active monitor probe instead of using this cmdlet.
+**Note**: This cmdlet works best in Exchange 2010. In Exchange 2013 or Exchange 2016, the functionality of this cmdlet has been replaced by Managed Availability. For the best results, use the Invoke-MonitoringProbe cmdlet and specify the relevant active monitor probe instead of using this cmdlet.
 
 For information about the parameter sets in the Syntax section below, see [Exchange cmdlet syntax](https://docs.microsoft.com/powershell/exchange/exchange-cmdlet-syntax).