


Upload a CSV file with the list of phone numbers. List of phone numbers – The list of phone numbers for which you want to set a custom calling name value.The name has a maximum limit of 15 characters. Custom calling name to set (15 chars only) – The custom calling name that you want to set.This is applicable to United States phone numbers only.

Custom Calling Name (US Only) – Set a custom calling name on your Microsoft phone numbers.One gotcha is that only tenant accounts can raise cases for that tenant, so partners will need a tenant account for each tenant to manage this for their customers, but that isn’t a super unusual requirement for managed service partners. Particularly as you can view your organisation’s cases in one place “view my company cases”. Hopefully, this will make it easier to manage your PSTN cases with Microsoft. The portal is at but can also be reached via the Teams Admin center: Previously Microsoft dealt with Microsoft provided PSTN number porting and number provision issues via some specific email addresses (like and As of July 22, 2021, the email system has been retired and replaced with a new dedicated portal.
