Draft import works, but you must have OU version 5.0.5, and OOTP version 13.7.26 or later. The instructions are in the ouReadme under Draft -> Operations:
OOTP OU Readme
Let me know if you have any further questions. It's pretty simple, really. Generate it in OU, copy it from the server to your local PC and run import from OOTP in-game. Just be sure to read the Very Important section.
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