Hello @Yifeng, Are the AP's online and checking into the dashboard? If so create a "New" wireless network and add all the AP's to this network. When this done you should have the ability to change the regulatory domain as per the article earlier posted. If you're still having issues, I'd suggest reaching out to Meraki support. There use to be an alternative way for them to manually override however I'm not sure if this process is still valid.
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