When you activate and configure directory synchronization, objects in your on-premises Active Directory may overwrite existing ...

When you activate and configure directory synchronization, objects in your on-premises Active Directory may overwrite existing objects in the %BRAND_OFFICE_365% directory. Specifically, if a user, group, or contact object in the %BRAND_OFFICE_365% directory matches an object that is being synchronized from an on-premises object, the %BRAND_OFFICE_365% object will be overwritten.