You can have Bookerville read your VRBO iCal feed. Go to your Bookerville Property Setup page, and scroll down until you see the "APIs, Calendar Sync, and Integration" section:
Look for the check box to "Allow Bookerville to block dates on your Bookerville calendar from VRBO's iCal feed". Be sure to check the box.
Next you need to find your VRBO iCal feed URL. To find your VRBO iCal feed URL, read VRBO's instructions on it. Look at the "Import external calendar" section of this page: Finding Your VRBO iCal Export URL
. Copy the URL (Ctrl-C) and paste it (Ctrl-V) into the field in your Bookerville Property Setup page.
That's it - Bookerville will begin reading your VRBO calendar and importing blocked dates from it into your Bookerville calendar. Some notes:
Be sure to read the "What's This" next to it for important details.
Bookerville currently reads external iCal feeds once per night
(2:30 am Eastern Time).
As of March 16, 2016, Bookerville is no longer removing bookings from your Bookerville calendar simply because those bookings don't appear on an external iCal feed. Instead, Bookerville sends an email to you notifying you of the booking that seems to be missing from the external iCal feed, so that you can investigate and remove it manually if needed. This is due to the unreliability of certain external iCal feeds.
Also note: Only dates (and usually at least an abbreviated guest name) will be brought over into your Bookerville calendar from an external iCal feed, because that is all the other systems usually provide. If you want richer data integration with listing sites, consider using one of Bookerville's Channel Managers:
BookingPal: BookingPal Channel Manager
Rentals United: Rentals United Channel Manager