Hi  @Justin_Seattle 

It seemed like you had done all the troubleshooting steps. To better understand the issue, we need more details:

1. Around how many wireless clients in total in the network?

2. Are all IOS clients having this issue? Or some yes, some not?

3. A screenshot/video when the issue happened, please include the error message;

4. How often will this issue happen? Or it's only happening when moving?

5. When did you first notice this issue? Since the installation? Or it works perfectly for sometime before this issue first happen?

  @Vincent-TP 

Thanks for responding:

1) l have about 50 wireless devices in the network

2) It started with iOS devices . iPhones had issues on and off but seem to be having fewer issues lately -- started about a month ago. It seemed like turning off the extra MAC address privacy was key to getting the other devices back on the network. But in addition to this in the last 2 weeks now the Macs are having issues. One Mac absolutely refused to join any network -- had to revert to hard wired via USB. That Mac did get back on the network in a different part of the house.

3) I'm not sure what diagnostics you are asking for. It's just a pop up saying unable to join network. Are you asking someone from the Omada controller side? 
4) It's periodic -- once a week. I don't think it happens without moving, but that is hard to k ow as phones and laptops are naturally mobile.

5) Worked perfectly until about a month ago and started with the phones. 

Hi  @Justin_Seattle 

Thanks for the detailed reply.

So turning off the extra MAC address privacy seemed crucial for getting other devices back on the network.

About the Mac, how could you make it connect to the WLAN again? Require a reboot on the mac, or anything else?

In the meantime, it's recommended to do some wireless optimization on the EAP units:

How to optimize wireless performance of EAP products