PCM customer impacted by Office 365 business email compromise Perch now has Office 365 log collection in beta testing. And, in good timing! A breach at large solution provider, PCM Inc., allowed hackers to access Microsoft Office 365 email and file sharing systems for some of the company’s clients. California-based PCM had more than 2,000 customers in 2018. According to Krebs’ sources, attackers stole administrative credentials that PCM uses to manage client accounts within Office 365, a cloud-based file and email sharing service run by Microsoft Corp.