Your Microsoft 365 environment is certified in SOC 2, SOC 3, ISO 27001:2013, and FedRAMP.
System and Organization Controls (SOC) 2 & 3 provides assurances that there are controls in place that protect your data.
ISO 27001:2013 is a well-known set of international standards relating to the secure management of information, particularly in a cloud-based environment.
Federal Risk and Authorization Management Program (FedRAMP) provides a U.S. government-wide standard approach for assessing, authorizing and continuously monitoring cloud-based products and services.