This icon is not covered in the admin guide, and I know it appears when the password is set to the default on, but in this case it has appeared again.
Anyone know what else causes this to appear?
As General Data Protection Regulation required, there should be a warning icon in the status bar warning information on the Status screen when the default password is used.
You can go to "Menu > Status > Warnings > Clear Icon" on the Phone User Interface to disable the phone to display warnings.
phone_setting.warnings_display.mode="0"
I just had the same issue - however, I know for fact we are pushing a password over to the phone, and I can see it in the configuration file.
The phone just isn't listening, and still warns. I had to disable the warning light to get the client to relax....