T26P - Need help on Remote Phonebook feature

Hi support team,

I am using yealink T26P (Software version is 6.73.193.50). And I tried to use the Remote Phone book function.
After set an URI (to get a xml file as below) at the phone's web page (Directory > Remote Phonebook).
I could see that device successfully downloaded the xml file. But, The Phonebook does not display on Phone's desk when I press setting key.

<?xml version="1.0" encoding="utf-8"?>
<T26IPPhoneDirectory>
<Title>YealinkPhonelist</Title>
<Menu name="sale1">
<Unit Name=" User1 " Phone2=" 1357"/>
<Unit Name=" User2 " Phone2=" 2468"/>
</Menu>
</T26IPPhoneDirectory>


Please help to confirm if above xml file is supported for T26P. Or any steps that I missed to configure the feature?

Thank you!