Hi NesaM, We ran into that issue with the AP-277 and AP-205H on coincidentally the same version you're running. As Colin said, it won't work. The AP won't ever reach the provisioning stage or even show up in the GUI - you will however see an error log on the discovered master controller along the lines of "minimum firmware not met" and the AP will eventually reboot due to not finding a suitable controller and continue to "appear" to never show up on the controller. As a temporary measure, we statically assigned the one needed AP-277 to our test controller running the 6.4.3 code via console cable. We then ran a separate pair of controllers for the part of campus that needed 205Hs - we're finally planning on consolidating our controllers back to a single master for ArubaOS 8.
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