New Email Error Plaguing QuickBooks Desktop Users of Outlook

QuickBooks Desktop users are inundating QuickBooks technical support with a new round of problems resulting from the sudden inability to send forms like Invoices, Purchase Orders or Estimates when they use Outlook as their email preference within QuickBooks.  The exact cause of the problem hasn't yet been 'released', but personally I believe it may have been the result of a very recent Microsoft Outlook 'security update' that is still in the process of being rolled-out because even some of my clients at the same businesses have not yet been impacted over the last 24+ hours, while others in the same office have.