Sage 100

I would really like to start using the eInvoicing feature in Sage 100c. I have it all set up within Sage (the eInvoicing check box is available in Customer Maintenance and I've sent a few test invoices using the feature). But, I find the email that is…

We have a Sage 100 client who is looking at Concur Expense Management. Has anybody integrated this with Sage 100? How did you do it? What were the difficulties? I'm looking for thoughts and/or recommendations. Thanks.