Prof. Dr. Thomas Hoeren has pointed out that the Hamburg Data Protection Commissioner is sending out an extensive questionnaire on Office/ Microsoft 365, and that various state data protection commissioners are planning a broad ban on the use of corresponding services. Prof. Hoeren and Marten Tiessen (both ITM Münster) have developed sample responses to the questionnaire from Hamburg against this background. The document contains helpful hints about Microsoft’s services and sample responses and is here retrievable.