One of the challenges concerning those implementing Service Delivery with Office365, is building proof that Office365 complies with regulatory standards and legislation. Service Assurance in Office365 is a primary goal, and if it vital that you understand how Office365 protects your data, especially since Office365 concerns email access, team communication, collaboration, content storage and specifically content viewed and edited in a browser. Service Delivery includes Service assurance, which is an organisational primary goal, and is directly aligned to the C/I/A triad (Confidentiality, Integrity and Availability), being key aspects of information security.
Office365 contains a Service Assurance area which allows Administrators to setup and provide resources to carry out risk assessments and audits, and includes a wealth of reports covering security, and the relevant legislation and standards that Office365 adheres to. I wrote an article for TechNet Blogs which gives a great overview on how to use Office365 Service Assurance (within the Security and Compliance section) here, go check it out!