I just recently added merchant services through Quickbooks to allow my customers to pay via emailed invoices.  I sent my first batch of 216 emails containing 430+ invoices and statements.  All customers had the online payments setup in their accounts.  I tested a few emails to myself before I sent off the 216.  After sending the 216 emails almost all of them show the View and Pay Now linke as "Link Unavailable" in the emails.  One customer had two invoices, one with the link and the other without. 

I spent 2 hours with tech support and all they could say was make sure the customers use Google Chrome.  I don't see how a customers's web browser would have any impact on Quickbooks generating an email with a link to my merchant services.  It seems like Quickbooks couldn't handle the amount of emails that it generated.  I may have to go into each invoice and select the email later options and resend them one at a time.  HAS ANYONE HAD THIS PROBLEM.  ANY SOLUTIONS WOULD BE GREATLY APPRECIATED....