[Forum FAQ] How do I change default values shown in Report Delivery Options?

Question

Introduction
Some users want to change default values shown in Report Delivery Options when creating standard subscriptions. Someone might want to always Cc the report to a specified user without sending the report URL. So they want to display those default values display
automatically when creating standard subscriptions like below.
Solution
To achieve this goal, please embed JavaScript code into the SubscriptionProperties.aspx file to change those default values (By default, the file’s location is: <Installation directory>\Reporting Services\ReportManager\Pages\SubcriptionProperties.aspx).
The example below will show how to set default values for “Cc” field and “Include Link” field.
Before coding, pleas find out the corresponding HTML tags of the two fields in the browser using IE Developer Tools.
Get “Cc” field with its corresponding HTML tag
Get “Include Link” field with its corresponding HTML tag
Embed such a code snippet at the end of the existing code within the SubcriptionProperties.aspx file
<script runat="server">   
protected void Page_Load(object sender, EventArgs e)
    Page.ClientScript.RegisterStartupScript(typeof(Page),"MyScript", "var cc = document.getElementById('CcEmailAddressesID');cc.value = '[email protected]';var IncludeLink = document.getElementById('ui_cbIncludeLink');IncludeLink.checked
= false;",true);}
</script>
Create a new subscription to check the default values shown in Report Delivery Options 
Applies to
Reporting Services 2005
Reporting Services 2008
Reporting Services 2008 R2
Reporting Services 2012
Reporting Services 2014
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Answer 1

Thanks,
Is this a supported scenario, or does it use unsupported features?
For example, can we call exec [ReportServer].dbo.AddEvent @EventType='TimedSubscription', @EventData='b64ce7ec-d598-45cd-bbc2-ea202e0c129d'
in a supported way?
Thanks! Josh