T46S autoprovision settings reverting to defaults

[Aaron_Yealink]

Dear Customer,

Thanks for contacting us. These issues cause by the phone syncing with the SFB online server configuration settings. You can change the Microsoft policy settings to solve these issue.

For the time format issue you can refer the link:http://support.yealink.com/faq/faqInfo?id=705

For the power saving issue, you can set the Microsoft policy "Set-CsIPPhonePolicy -EnablePowerSaveMode $False" to disable this feature.
Microsoft policy set the Office Hour Idle TimeOut to 15min by default.

For the firmware update issue

1.You can set the policy parameter "Set-CsIPPhonePolicy -EnableDeviceUpdate $False" first;
2.Then the the phone will not download firmware from the Skype for Business server. The phone will choose to download firmware via central provisioning (if configured).
3.Isuggest that change your firmware name to 66.9.0.25 format.

Please let us know if it works for you.

Thanks!