You can use the following PowerShell script module to remove the Exchange functionality completely from an Active Roles instance.
function onPostGet($Request)
{
$Request.Put("edsaIsMsExchangePresent",$false)
$Request.Put("edsva-MsExch-MailboxDatabasesConfigID","")
$Request.Put("edsva-MsExch-MailboxDatabasesXML","")
}
Create a new policy to include the above script module and apply the script module to both the Active Directory node and the Server Configuration node.
To apply the policy to the Server Configuration node, you will need to have the Advanced Details Pane turned on. Once it's turned on, select the Server Configuration node and choose the Active Roles Policies tab on the Advanced Details Pane. Add the policy here.
