Update Export-TransportRuleCollection.md

Modified Applicable value for Identity parameter (2010 only).

Author: chrisda

exchange/exchange-ps/exchange/policy-and-compliance/Export-TransportRuleCollection.md

@@ -101,15 +101,15 @@ Accept wildcard characters: False
 ```
 
 ### -Identity
-This parameter is functional or available only on Exchange Server 2010.
+This cmdlet is available only in on-premises Exchange, and is functional only in Exchange Server 2010.
 
 The Identity parameter specifies the name or GUID of a transport rule to be exported.
 
 ```yaml
 Type: RuleIdParameter
 Parameter Sets: (All)
 Aliases:
-Applicable: Exchange Server 2010, Exchange Server 2013, Exchange Server 2016, Exchange Online, Exchange Online Protection
+Applicable: Exchange Server 2010, Exchange Server 2013, Exchange Server 2016
 Required: False
 Position: 1
 Default value: None