Merge pull request MicrosoftDocs#1344 from Tangela123/patch-3

Update to ComplianceRetentionPolicy to state a location parameter is required to create a retention policy

Author: chrisda

exchange/exchange-ps/exchange/policy-and-compliance-retention/New-RetentionCompliancePolicy.md

@@ -29,7 +29,7 @@ New-RetentionCompliancePolicy [-Name] <String> [-Comment <String>] [-Confirm] [-
 ```
 
 ## DESCRIPTION
-New policies are not valid and will not be applied until a retention rule is added to the policy.
+New policies are not valid and will not be applied until a retention rule is added to the policy. In addtion, at least one location parameter must be defined to create a retention policy.
 
 You need to be assigned permissions in the Office 365 Security & Compliance Center before you can use this cmdlet. For more information, see Permissions in Office 365 Security & Compliance Center (https://go.microsoft.com/fwlink/p/?LinkId=511920).