D-link DAP-2590 VLAN configuration

Solution 1:

Thank you Mike. I finally figured it out. Its a very weird configuration. It makes total sense now, but the steps are not obvious. The issue was linked to the PVID default settings tied to the "management" interface of the AP. Once that was changed as you pointed to, everything is now resolved. Thank you very much!

Details for anyone who follows in my footsteps. Be sure to disable auto PVID configuration and set the "management" VLAN PVID to the VLAN ID you intend to use for management purposes. This includes just piggy backing management over another VLAN, for example the employee VLAN.