Configuring Task Scheduler with GPO

About

First, This is not a guide of how to create a GPO that will deploy a Task,
If you are looking for a "How To" guide you can search Google or just follow the below link:
http://technet.microsoft.com/en-us/library/dd851678.aspx

Problem

I noticed a weird problem while configuring a Task using GPO,
The Task configure by default to be disabled and there isn't any conventional way to enable it,
See for example:

GPO Setting:

The ability to enable the task is not exists, once the policy been refreshed you will noticed that the affected machine/server will show the task as Disabled.

I found this issue on Server 2012, haven't tested it on Server 2008R2 or below.

Solution 

In the Group Policy editor extract the UID of the GPO, mine was -

{476EA74A-DA3A-4497-AE39-310031C6813F}

Then, I navigate to the SYSVOL folder, which holds every GPO,

and {476EA74A-DA3A-4497-AE39-310031C6813F} folder i edited the XML file associated to the GPO.

See below:

I change the value of the Enabled XML tag from false to true, and saved the XML file.

That's it!

Once done that the Task showed as Enable and on the end Machine/Server after a policy refresh it appeared as Activated.

Hope this helps.