This document discusses email archiving options when migrating to or using Office 365. It recommends using a specialized archiving solution rather than archiving within Office 365, noting that specialized solutions do a better job of archiving all information, enabling eDiscovery readiness and legal holds, and using the right tool for the job. It also outlines key questions to consider regarding what can be archived in Office 365 versus other data, how well legal discovery is supported, and security of legal holds. An example archiving vendor, AXS-One, is presented as offering a cloud or on-premises solution that can archive various data types to support information governance, compliance and eDiscovery needs.