adjust some wording based on feedback

Author: jimmart-dev

articles/storage/common/sas-expiration-policy.md

@@ -37,7 +37,7 @@ When you configure a SAS expiration policy on a storage account, the policy appl
 
 ### Do I need to rotate the account access keys first?
 
-Before you can configure a SAS expiration policy, you might need to rotate each of your account access keys at least once. If the **keyCreationTime** property of the storage account has a null value for either of the account access keys (key1 and key2), you will need to rotate them. To determine whether the **keyCreationTime** property is null, see [Get the creation time of the account access keys for a storage account](storage-account-get-info.md#get-the-creation-time-of-the-account-access-keys-for-a-storage-account). If you attempt to configure a SAS expiration policy and the keys need to be rotated first, you will see a message indicating that.
+Before you can configure a SAS expiration policy, you might need to rotate each of your account access keys at least once. If the **keyCreationTime** property of the storage account has a null value for either of the account access keys (key1 and key2), you will need to rotate them. To determine whether the **keyCreationTime** property is null, see [Get the creation time of the account access keys for a storage account](storage-account-get-info.md#get-the-creation-time-of-the-account-access-keys-for-a-storage-account). If you attempt to configure a SAS expiration policy and the keys need to be rotated first, the operation will fail.
 
 ### How to configure a SAS expiration policy