A few weeks ago we added support for eRentalLock door locks.
If you have one of these locks already, they are very easy to set up. Once you've got them connected on LockState Connect, go to Settings > Door Locks in OwnerRez (under integrations) and add your account there.
We've written comprehensive support articles about both systems, with instructions on everything from code generation (manual, automatic, and bulk) to field codes and email templates:
Do you use a different lock type? Let us know in the comments and we'll add it to our list of future integrations to research.