In the Address book field, select All staff
Now select the first person on the list and scroll down to the bottom, hold SHIFT and press the last person (in this way you will select all members from the list)
Click the right button of your mouse and select Add to Contacts
Select Update All
Be patient, it can take some time.
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To add contacts to your phone, follow the instructions below:
Open Outlook App
Press on you initials on the top left corner and choose Settings
Select your account
Enable contact synchronization:
It can take up to 1 hour to appear on your phone contacts list.