9 APs are connect correctly, it is a 12 APs licence, I have eight zf2942 and one zf7363 connected succesfully at the moment. I have three further zf7363 APs, but these are not connecting to the zd or are not visable.
Only the zf7363 don't connect.
No, it is not possible to see under Monitor/Access Points, no VLAN. The are all in the same network, normally we use fix IPs but there is a small zone for DHCP where the new AP is in. But I have tried also with a fix IP no change. From AP the ZD is possible to ping and also from ZD to AP it is possible. No VPN encapsulation is used. What do you mean with Option 43?