Please follow Mapping To an Online Travel Agent (OTA) to create your connection initially.

As Laterooms PUSH bookings to GuestDiary, please review this link also. Push Bookings.

Once the screen below appears, follow this tutorial.

Click 'Create New Mapping'.  This will provide a row for mapping similar to what you see when mapping any other OTA.

Start with mapping to the Occupancy from your GuestDiary property.

Click on the mapping menus on the left side of each room/apartment to connect to.

When you click you will see all Pyhsical Occupancies that you have in your property.  This is where the availability will come from.  As you hover over each occupancy another menu will open with the virtual or rate occupancies that are appropriate for the availability occupancy.  Do not click until the final menu (Guests) or you will have to start that mapping again.
In the example above a Double room can be sold at a Single or a Double (Rate) Occupancy.
The Rate Occupancy is the occupancy where the price per night and restrictions will come from once the Rateplan has been selected.
The next menu that appears when you hover on the Rate occupancy menu is the Rateplan menu e.g. B&B or Room Only.
The next menu that appears (Guests) is the number of guests and discounts (if any) appropriate for the selected Rateplan.  Click the desired number of guests and discount (is appropriate).  Note: Price Per Stay discounts will not be applied to the per night rate.
If you have set up a child rate for the selected Occupancy Type (Room, Apartment, House etc.) the per night rate sent to the OTA will be calculated based on the number of children you have included in the mapping.

Once you have selected the Ocupancy in the Diary you will then select the Occupancy you want to create on LateRooms.

Enter a room description and rateplan description if desired and click 'Add the new room'.
Repeat as necessary.
Once you have added all you rooms click 'Save Mapping'.  This will create the occupancies on LateRooms.

If you always want the occupancy to be closed on the OTA then select 'Always send zero availability and closed status'  from the drop down menu to the right of the OTA occupancy.  Doing this will ensure any modified reservations can still update existing reservations of this occupancy.
If you never want to send any rates, availability or restrictions to the OTA for a mapping then select 'Do not send any updates'.  
If you wish to remove a LateRooms mapping, Select 'Unamp' from the Occupancy In Diary Menu on the far left, instead of selecting an occupancy.

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