Let’s Encrypt’s root certificate is about to expire

[ChrisKoll]

FYI, Just found this out, https://techcrunch.com/2021/09/21/lets-encrypt-root-expiry/

 

[NickD_3CX]

That's right!
So make sure to do any Firmware Upgrades of any IP Phones you have and make sure the web browsers are all up.
You should be fine by taking these steps.