Thank you for your question, in this case since the access points were disconnected for roughly two months, we will need to double-check the current AP firmware, cloud updates could have taken place during the idle time.
You can try to factory reset one of the access points and then access it using default credentials, "super" and "sp-admin", the reason why we want to do the factory reset is because otherwise, you will need to open a support case for us to help you access the units with the cloud credentials since they received at some point the cloud configuration update.
Once in, make sure we still can ping "device.ruckus.cloud" from the AP, you can also check the current AP status running "get acx" or "get scg" on standalone firmware, the AP needs to have DNS configured and NTP should be the current date, you can check that running "get ntp"
To check AP firmware run "get version" and compare that one to the current venue version, if it looks too old you can do the factory reset on the other impacted units and check again. As a last resource you can update them to standalone firmware after the factory reset if any are still not joining, you can find the required standalone firmware for the R650 model right below: