Yes you can but you need to let us know in advance.

Atlassian Cloud runs a different version of their products than the one you would normally install on your own servers (see for example this official page about Confluence and Confluence Cloud).

In the last step of our signup form you will be able to leave us a note and that's where you should let us know you want to import from your existing Atlassian Cloud instance so that we can prepare your special 'OD' instance.

And remember that if you subscribe to a Yearly plan we will be happy to do the migration for you.