Hello marcschuetz74
Since this is a customer helps customer forum we have no access to the internal system.
If you are looking to get your SIP credentials for your FRITZ!Box it is best to contact the support hotline directly on 0800 707 707.
If you are still waiting for the IPv4 activation that you asked about in your other thread you should wait until that change is fully completed before you configure the DMZ mode.
Cheers cosmo