Yealink IP Phones do not sinchronize time and date with Yeastar U100


I have a Client with a Yeastar u100, I installed it 3 years ago. All the Yealink IP phones were manually programmed.

Now, I am programming them with automatic parameters and I see that time and date do not synchronice between Yeastar IPPBX and Yealink IP phones.

Yeastar U100 firmware is

What can I do...?

Best regards

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