Hi @IBN
What is your phone number? On-premise or Online?
If you are managing the user's phone number on-premises, you need to ensure that the user is Enterprise Voice enabled online by using the following command:
Set-CsPhoneNumberAssignment -Identity "<User name>" -EnterpriseVoiceEnabled $true
If you are managing the user's phone number online, you need to assign the phone number to the user by using the following command in Teams PowerShell. The user is automatically Enterprise Voice enabled by the command:
Set-CsPhoneNumberAssignment -Identity "<User name>" -PhoneNumber <phone number> -PhoneNumberType DirectRouting
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