Calendox

Keep every Microsoft 365, Outlook.com and Google calendar in sync in real time — then manage them in one place and share booking pages that only offer times you are genuinely free.

Why choose Calendox?

• No more double-bookings: a change in one calendar is pushed to every synced calendar the moment Google or Microsoft notifies us, so time booked anywhere is visible everywhere.
• Works where you already work: synced events land in Outlook and Google Calendar, so nobody changes tools; the unified calendar and booking pages are there when you want them.
• One subscription for the team (Business): team admins assign seats and roles centrally — all admins are equal — and members never buy their own.
• No per-user sign-in for IT (Enterprise): for organisations that keep calendars in sync across two or more Microsoft 365 tenants, one Microsoft Entra admin consent per tenant — users never sign in to Calendox.
• Private by design: Calendox never stores the content of your events — no titles, descriptions or locations — only identifiers, times, recurrence rules, sync state and a one-way fingerprint used to detect changes. Booking visitors see free/busy slots only.

Key features

• Real-time cross-provider sync: Google and Microsoft notify Calendox as soon as an event changes; one-way or multi-way, including recurring series, edited occurrences and cancellations, with built-in loop protection.
• Unified calendar: create, edit, reschedule and delete events across every connected account from one view, and add a Google Meet, Zoom or Microsoft Teams link as you save (Teams requires a work or school Microsoft account).
• Booking pages: share a scheduling link checked live against your connected calendars — all of them by default, or the ones you choose. Require approval before confirming — the requested slot is held while you decide. Buffers, minimum notice, booking windows and daily/weekly caps included.
• Tenant-to-tenant rollout for Microsoft 365 (Enterprise): keep calendars in sync between your tenant and partner, contractor or subsidiary tenants — one admin consent per tenant, bulk CSV import, automatic pairing when the email username and calendar name match, and a central tenant dashboard. The consent grants calendar access, the user list and your organisation's name and domains only — never mail, files or contacts.
• Team administration (Business): invite members, assign Admin or Member roles and allocate per-seat licenses from one account.

Built on Microsoft

• Microsoft Graph for every calendar, event and Teams meeting operation; Microsoft notifies Calendox as soon as an event changes.
• Microsoft Entra ID for sign-in and tenant-wide admin consent.
• Microsoft Teams meeting links added to events and confirmed bookings when Teams is your chosen meeting provider (work or school Microsoft account; bookings need a work or school destination calendar).
• Hosted on Microsoft Azure, with data encrypted in transit and at rest and isolated per account at the database layer. Google and Microsoft calendars connect with OAuth — Calendox never sees or stores those passwords; an Exchange Server sign-in is stored encrypted and sent only to that server.
• Verified publisher: Danilix is a Microsoft verified publisher, so the verified badge appears on Microsoft consent screens.
• Microsoft Marketplace billing: purchase under the Microsoft Standard Contract, charged to your Microsoft billing account or Azure subscription, and managed — plan, seats, cancellation — from the Microsoft 365 admin center.

Good to know

Calendox supports Microsoft 365 (Exchange Online), Outlook.com and Google Calendar, plus on-premises Exchange Server 2016 or later on Personal and Business plans; Exchange Server changes reach Calendox within about 5 minutes. The unified calendar and booking pages are included on every Personal and Business plan. One Microsoft 365 tenant? Choose Business — each licensed member connects their own calendars. Two or more tenants to keep in sync? Choose Enterprise (Microsoft 365 only, tenant-to-tenant sync; Google and Exchange Server calendars connect per user on Personal and Business). Marketplace plans include a free trial run by Microsoft; its terms are shown at checkout. You can also sign up at calendox.com for a 14-day free trial, no credit card required (Enterprise trials cover up to 5 secondary-tenant calendars). The two trials do not add up: activating a Marketplace subscription, including one on a Microsoft trial, ends any remaining calendox.com trial on that account.

Ready to get started with Calendox? Click the "Get it now" button above to select the plan that best fits your needs.