SG135 + AP55 - License expired - How to reset AP55?

Question

Hello everyone, 
 I received a SG135 and 3 of their AP55 from a customer. 
 I have access to the UTM, but the license has expired. 
 Therefore I'm unable to do any changes on the current settings. 
 How can I reset the AP55 to rebuild the hardware bundle for a new lab environment? 
 Is it possible to activate a home license to do the reset? 
 Or does this license delete the settings and then I can no longer access the devices?

Denis Sellemann · Accepted Answer

Thanks for the information. 
 jprush was kind enough to help me out with a test license. 
 For whatever reason, the three AP55 were not recognized by my test UTM (VM). They just didn't show up under "Pending APs". 
 This morning, after activating the expired license on the SG135 (which previously managed these three APs). I was then able to delete them there and They just reappeared on this SG135 under "Pending APs" a short time later. 
 Only then they were also recognized by my test UTM and I haven't been able to figure out why that was yet. 
 I had previously tried unsuccessfully to re-flash the three AP55 with the Sophos Flashutility, but the Flashutility didn't recognize them - presumably because they still had running firmware and were able to boot successfully? 
 Finally, I was able to put the devices into operation in my desired test environment. Many thanks especially to jprush and also to Alan Brand for the help and tips.

SG135 + AP55 - License expired - How to reset AP55?

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