Office 2013/365 and ProjectWise URL/URN

Has anyone seen an issue when sending a ProjectWise URL or URN within an e-mail (Outlook) and the receiving user is using Office 2013/365 Outlook (this is actually an external user, someone not on the same domain) the ProjectWise URL or URN will be displayed as plain text?

Other urls (Non ProjectWise) in other e-mails show as an actual url