Every 1-2 months we have to open RMA because of onhook offhook problems with 7841 phones, they generally are 2-3 years old.

I confirmed the problem with the notification was because the time on users computers was ahead in time. Updated the time on windows settings, made the test call and the notification poped up on the right corner.

I just had this problem on webex, 3 users complained about not receiving notification from calls, there was no popup on the right corner. I Tried to replicate the issue by changing the time on windows. With a time forward of 4 minutes the webex still...