CREDIT NOTE FOR INTERCOMPANY

Hi All,

I have done a intercompany sales order in AX2012 R3. I gave a wrong detail and invoiced it in sales and inorder to do a credit note i also have invoiced the PO in intercompany and as soon as invoiced it, at both the places (SO & PO) Credit note option has got disabled.

How can I do a credit note for this ?
and can i also do a credit note when i have only done a SO which has created a Intercompany PO without invoiceing the PO ?

please help me resolve these two above raised issues which am facing.
Thanks in advance.

Kind Regards,
Vinod Rao