The Microsoft 365 integration lets you see your GECKO bookings in your Outlook calendar and avoid double bookings. Appointments from GECKO are synchronized to the primary calendar of the linked Microsoft user, and appointments created in Outlook with the status «busy» return to GECKO as closed working hours, so the time slot is blocked.

Step 1 – First-time setup

First the integration must be set up once for your whole company. This is done partly in your Microsoft Entra (Azure) and partly under Settings > Integrations. See the step-by-step instructions here: .

Note that GECKO Booking does not provide support for setup in external services such as Microsoft Azure. If you do not have access to your Entra, ask your IT administrator for help.

Step 2 – Link the individual calendars

Synchronization is set up on each individual calendar. See how it is done here: . Here you also choose whether the calendar should sync both ways or only one way, if the overall settings allow it.