I download the latest version s52001tcnc7_3_21.pkg. And I set it to factory default. But upgrade failed.
When this phase: Running post-install hooks from installed package. It can't finish.
Now My Current version is TC6.1.1.7d7af15.
Can I register ex90 to webex with TC6.1.1?
Thanks,
I see from your file name you have the non crypto file - is that what you meant to have? That will not work if you're running standard code now - try using s52000tc7_3_21.pkg instead.
That said - you cannot register the EX90 to the Webex cloud - it only will work with endpoints that are capable of running CE code. EX's, first gen MX200/300, and C series are all TC code only. Here's a list on a partner site.
https://www.peakinsight.com.au/cisco-webex-meetings-devices-that-can-be-cloud-registered/