Add REPLACE option to Policy effects
Please provide a "replace" effect. For example, I want a policy which sets Microsoft.Storage/storageAccounts/enableBlobEncryption to "true" if it is "false". If you attempt to replace an existing value using "append", it will fail.
Yes, there is a danger of specifying one value in a template and not being aware the resource was deployed with another value. But some fields (like enable service encryption) are either true or false -- there is no "unspecified" state. Hence, the need for "replace". Also, I still want the ability to replace a field even if a different value was specified (you can always log the action).