The sync window is changed under [Settings] - [Accommodation] - [Sync window].
Where a sales channel limits its own selling window, the channel’s policy wins.
What happens if I shorten the sync window?Bookings, inventory, and rates stop syncing for dates beyond the shortened window. Manage those dates on the channel directly from then on.
What happens if I extend it?On some sales channels, packages that have no rate or inventory set yet can appear as available to book. Get those settings in place first, in line with how you operate.