How to sync HBook with GreenGo?
Please refer to this GreenGo article to find out where to locate the settings for importing/exporting the calendar: Comment synchroniser mon calendrier GreenGo avec une autre plateforme ?
Step-by-step guide to syncing with Greengo in both directions:
In HBook > Sync with iCal, click "Get URL" and copy the URL given by HBook for that accommodation.
Once you've logged in to Greengo > Calendriers > Calendriers exterieurs, in the section Importer un calendrier, paste the HBook URL and enter a calendar name. Click “Importer le calendrier”.


Now, still on this same page, in the section Exporter mon calendrier GreenGo, copy the given iCal URL.

Back to HBook > iCal sync page, click on “New calendar”, enter a name for it (“Apartment 101 Holidu” for example), paste the URL and click on “Add”.
We highly recommend the following setting for the synchronization to work properly:
in HBook > iCal sync > Import settings, set “Exclude blocked dates from the import” to “Yes”.
in HBook > iCal sync > Export settings, set “Include blocked dates in the export” to “Yes”.
if you have any date that you need to block (for example, for painting work), please do so from HBook > Reservations > Block accommodation.