Posting Lease Journals follows the same process as posting Depreciation Journals. Open the Journals section on the left-hand menu (1), and press "+ Create" (2).
On the side panel, set the date of the Journal (1). To make it a Lease Journal, uncheck "All" (2), then select all the details related to Leases that you wish to include in your Journal (3). When you're done, press "Create" (4).
The Journal has now been created, and you can now export it to a spreadsheet, or post it to the integration of your choice (so long as your General Ledger Accounts are mapped).