This is a known issues and happens usually when new products get released.
The Anti-Virus email scanner add-in for the new release of the e-mail program is not supported and thus prevents e-mails from going out and crashes the new application.
One of the challenges of many organizations is the ability to migrate data from one CRM Organization to another. This challenge occurs when working in a hybrid environment or when trying to update development, test and production environments.
Microsoft Office 2013 along with the other branded 2013 applications and server products have been release to manufacturing and are now available for download from the MSDN, Technet or Microsoft Partner web site.
