Do I have to give you the tenant ID (as requested in the procedure)? Yes, the tenant ID is required for our "e-securemail for office365" solution and allows access to the messages to be scanned. Tags Tenant Microsoft Office 365 Published: 07/03/2026 12:24 pm I jsut migrated my email to Microsoft 365, do I need to change the MXs? Do message reminders work with the e-securemail for Microsoft 365 solution?