Turn Off ‘How was the call quality?’ in Skype for Business Online
Skype for Business Online users that use Enterprise voice will receive a pop up every once in a while asking to rate your call experience:
In order to circumvent that, you can connect to your tenant in Powershell and disable it with the RateMyCallDisplayPercentage option.
Set-CsClientPolicy Global -RateMyCallAllowCustomUserFeedback $False -RateMyCallDisplayPercentage 0
Wait a little bit for O365 to replicate and the next time you sign out and sign back in again, the message will no longer display.