Account Right v19 Duplicating outlook contacts

I have a client that is having issues with Account Right v19 Duplicating contacts within outlook 2007, confirmed that no sync card sync in MYOB on at the moment and the issue seems to occur when emailing invoices/remitiences from MYOB using outlook as the email client

Hoping someone can help me narrow down what is causing this to occur wether it be outlook or MYOB 

Thanks 

Simon Mezzomo