Feb 22 2018 11:50 AM
Feb 22 2018 02:57 PM
Porting of User numbers and Service numbers are separate see: https://docs.microsoft.com/en-us/skypeforbusiness/what-are-calling-plans-in-office-365/transfer-phon...
That being said if you already ported the number as a User number, you will need to create a support ticket in the Office 365 Admin Center to get it converted to a Service number.