I just bought some Meraki devices with active licenses. The previous owner made me an admin and I removed his credentials so I am the only one having access. Now this new organisation shows up in my admin page. I have 2 organisations now.
How can I move devices to my own organisation while retaining the current license?
If you have "just bought" the licences go to Organisation/Licence Info. The licence will show up with a "undo" button that lets you remove the licences. Make a note of the licence number, and then you can add them to your new organisation.
Note they have to have been added recently for this to work.
The undo button goes away once the licences have been there a while.