‘Microsoft.Policies.WindowsStore’ is already defined as the target namespace

After deploying new Windows 10 ADMX, the following error appears when you edit your GPO’s:

“Namespace ‘Microsoft.Polices.WindowsStore’ is already defined as the target namespace for another file in the store.

File \\xxxx\sysvol\xxxx\Polices\PolicyDefinitions\WinStoreUI.admx, line 4, column 80″

The name of “WinStoreUI.admx” was renamed to “WindowsStore.admx”. So there are two ADMX files that address the same policy namespace.

To solve this issue:

1. Copy “WinStoreUI.admx” and “WinStoreUI.adml” (which is located under the language folder) to a backup folder.
2. Delete these two files
3. Rename “WindowsStore.admx” to “WinStoreUI.admx”
4. Rename “WindowsStore.adml” to “WinStoreUI.adml”
5. Close Group policy management console and try again!

 

Thanks for reading! You can follow me on Twitter @PrigentNico