The accounts for the NAF are normal DESY accounts. Several cases are possible, getting access to the NAF depends on your particular case.
Please consider special procedures of your experiment/VO first!
Do you currently have a valid DESY account (e.g. because you work at DESY)?
In order to fully utilize the NAF, your accounts needs additional rights and group memberships. Ask your group administrator for the ressource batch and the membership in af-NNN (NNN being your experiment)
Did you once had a valid DESY account, but it has expired (e.g. because you were summer student at DESY)?
We know you as a person. Get in contact with your experiment support and have them reactive your account. You will get the ressource batch'and the primary membership in af-NNN automatically
You already have/had an account in experiment X, and now moved/joined experiment Y?
Get in contact with the supporter of experiment Y on how to proceed. Usually, you will get additional permissions for the new experiment.
You never had an account at DESY?
You need to register using the interface https://naf2-request.desy.de/. In order to be able to use this web interface, you must posess a valid Grid certificate and it must be configured in the browser you are using.
Managing your password
Point your browser to https://passwd.desy.de/ and follow instructions