Hello Eric,
You are loading an intermediate/ conversion image onto the APs. This should
only be used when converting them from Extreme to WiNG. In other words making the AP4532 an AP6532.
This image should not be used for anything other than the conversion process. If your intention is to convert them to WiNG then you will need to upgrade to the final 5.7 Zebra image per info below:
Extreme product name Intermediate/Conversion image name Final Zebra Image (WiNG)
AP4532 AP4532-CONVERSION-5.7.0.0-057RM.img AP6532-5.7.0.0-057R.img
If you don't intend on converting them to WiNG then the Extreme firmware you're currently on (5.5) is probably the latest you can upgrade to.
Should you wish to get them up to latest WiNG image, you will have to go through firmware AP6532-5.7.0.0-057R.img first. All this is information is in the release notes for 5.7.0.0.
Please contact the Extreme wireless support team for more information on the conversion process.
Regards,
Chris
Christoph S.