# Appointment Booking All in One with Calendar Sync > Appointment booking with calendar sync: a subscription link for staff without an Odoo login, and their own calendar read back to block slots. - **What it is:** Appointment booking with calendar sync: a subscription link for staff without an Odoo login, and their own calendar read back to block slots. - **For:** Website - **Odoo versions:** 16.0, 17.0, 18.0, 19.0, 20.0 - Community and Enterprise - **Runs on:** Odoo.sh or Odoo you host yourself - not Odoo Online, which accepts no third-party apps - **Price:** 228 EUR, one-time, on the Odoo Apps Store - **Technical name:** bambooforge_booking_calendar_sync - **Manual:** https://docs.bambooforge.dev/bambooforge_booking_calendar_sync/ - **Live demo:** https://demo20.bambooforge.dev/odoo/action-bambooforge_booking_calendar_sync.action_bf_booking_busy - **Store page:** https://apps.odoo.com/apps/modules/20.0/bambooforge_booking_calendar_sync - **Manual last updated:** 2026-10-15 --- # Appointment Booking All in One with Calendar Sync An add-on for **BambooForge Booking Pro**, for the staff who will never have an Odoo login. ## What Odoo already does Odoo Community ships `google_calendar` and `microsoft_calendar`, and Booking Pro already refuses a slot when a staff member's **Odoo user** has a calendar event in the way. If your staff are Odoo users, connect their accounts in their own preferences. That is free, it is two-way, and this module does not try to sell it to you again. ## What this adds The freelance trainer, the visiting dentist, the photographer who works Thursdays - none of them are Odoo users, and none of them will be. ### A subscription link On the staff member's form, **Create a subscription link**. It produces a URL ending in `.ics`: paste it into Google Calendar ("From URL"), Outlook ("Subscribe from web"), Apple Calendar or a phone. Their bookings appear and keep updating, because that is what a subscribed calendar does. **Revoke the link** stops every calendar that has it - for the day a phone is lost. A revoked link and a wrong link answer identically. ### Their calendar, read back Paste the secret iCal address their own calendar publishes: - **Google Calendar** - Settings for my calendars → *Secret address in iCal format*. - **Outlook / Microsoft 365** - Settings → Calendar → Shared calendars → *Publish a calendar* → ICS link. - **Apple iCloud** - share the calendar publicly and copy the webcal address. Events found there **block slots**. Odoo never writes to that calendar: the sync is one-way in, one-way out, and nothing of yours ends up in their personal diary. Refreshed every fifteen minutes. A calendar checked once a day is a double booking waiting to happen. ## What the reader understands Deliberately small, and deliberately explicit about it: | Understood | Not understood | |---|---| | Timed events with a zone | Monthly and yearly repeats - imported as a single event rather than expanded wrongly | | All-day events, in the | Exceptions to a repeat (EXDATE) - the | | calendar's own zone | occurrence stays blocked | | Cancelled events (skipped) | Attendee status: an invitation you have not answered still blocks | | Events marked *free* | Attachments, alarms, anything not a time | | (skipped) | | | Daily and weekly repeats, | | | with COUNT and UNTIL | | A wrong busy block silently costs a booking; a missing one costs a manual check. Where the two conflict, this errs towards blocking. ## Housekeeping - Imported busy time older than two days is deleted by the standard autovacuum. - A pull replaces that member's imported blocks - no duplicates build up. - A calendar that fails to answer is reported on the staff form and does not stop the other members from being refreshed. ## How we make sure it works Before every release, **29 automated checks** run against this app on Odoo 16, 17, 18, 19 and 20. Among them: - A url that is not a url is refused. - A monthly repeat is imported once not guessed. - The link serves a calendar and a wrong one does not. - A comma in a summary does not split the line. - An event marked free is not busy. The complete list is in the source you receive. ## Install 1. Copy `bambooforge_booking_calendar_sync` into your addons path and update the app list, or install the ZIP from the Odoo Apps Store. 2. Install **Appointment Booking Suite: Google & Outlook Sync**. 3. Open **Imported Busy Time**. ## Questions people ask ****Which Odoo versions does it run on?**** Odoo 16.0, 17.0, 18.0, 19.0, 20.0, on the series you buy it for; each series is its own listing. ****Community or Enterprise?**** Both. It needs no Enterprise app. ****What does it need?**** The standard Web; booking pro (BambooForge) must be installed first app. No extra Python package. ****Where does it show up?**** Under the **Imported Busy Time** menu. ****Does anything leave my server?**** It makes calls outside your server only where its manual says so - read the section on that service before you connect it. ****What happens if I uninstall it?**** Odoo drops the app's own tables and fields; the standard records it worked on (contacts, orders, products) stay as they are. ## Support [support@bambooforge.dev](mailto:support@bambooforge.dev) - the people who wrote it.