@CarlosL727 Hi, try the recovery mode to take the EAP back: How to use the Recovery Mode to recover the firmware for EAP

@entername Two CPEs do network extension point-to-point and have dropout problems, you need to go section by section to troubleshoot the possible causes. You can first test whether this end of the AP...

@W38122077 I found something here, and the answer is no, it doesn't support 160MHz in 5G radio.

@gantzm Oh, you said FQDN, I'm afraid the omada device doesn't support it yet.

@gantzm Do you have a domain? It shouldn't be localhost, it should be a domain. Share a screenshot of the error message: 421-4.7.0 Try again later, closing connection. (EHLO) 421-4.7.0 Learn more at...

@BoboXX If you back up the files manually, can it work? Did the firewall block any ports? Check it.