Assign a phone number in Skype for Business

When you set up PSTN Calling, you assign phone numbers to your users. The phone number you assign will be listed in the This Work Phone box in their Skype for Business client and can't be changed by a user.

Work Phone Number is Greyed Out.

Important: If they want to Change my phone number for Skype for Business and the phone number in the Skype for Business app can't be changed or is grayed out, that means an admin has set it for them and it can't be changed by them.

Assigning a number

When you are setting up users so they can make and receive phone calls, you must first use the Skype for Business admin center and assign a phone number but you can change or remove the phone number if you need to.

Want to know how to get PSTN Calling and how much it costs? See Skype for Business add-on licensing.

Note: One way to see if a user has a license assigned is in the Skype for Business admin center > Voice > Voice users and select the user. If a license is assigned, it will be listed under the Assigned license. You can use the Office 365 admin center though too.

Assign a phone number to a user
  1. Sign in to Office 365 with your work or school account.

  2. Go to the Office 365 admin center > Admin > Skype for Business.

  3. In the left navigation, Voice > Voice users.

    IMPORTANT: For you to see the Voice option in the left navigation in the Skype for Business admin center, you must first buy at least one Enterprise E5 license, one Skype for Business Cloud PBX add-on license, or one Skype for Business PSTN Conferencing add-on license.

  4. On the Voice users page, locate and select the user or users that you want to assign a phone number to.

  5. In the Action pane, click Assign number.

  6. On the Assign number page in the Select number to assign list, then select the phone number for the user.

    Tip: If you don't see any phone numbers listed, you need to go Get them phone numbers first or If you use the Skype for Business admin center > Voice > Phone numbers page > click Add then New user numbers.

  7. To assign or change the associated emergency address under Select validated emergency location, either select the location from the list or if you have many locations defined put the name of the city in the Search by city box and click Search.

  8. After you pick the phone number and emergency location, click Save.

    Notes: Because of the latency between Office 365 and Skype for Business Online, it can possibly take up to 24 hours for user to be enabled. If after 24 hours, the phone number isn't assigned correctly, please Call us. We're here to help!

Changing a number

To change a phone number for a user
  1. Sign in to Office 365 with your work or school account.

  2. Go to the Office 365 admin center > Admin > Skype for Business.

  3. In the left navigation go to Voice > then click Voice users.

  4. On the Voice users page, locate and select the user or users that you want to change a phone number for.

  5. In the Action pane, under Assigned number click Change number.

  6. On the Assign number page, click Change number.

  7. On the Assign number page, under Select number to assign, use the list to select the new phone number.

  8. To change the associated emergency address click Change location and under Change emergency address to, either select the location from the list or if you have many locations defined put the name of the city in the Search by city box and click Search.

  9. Click Save.

Removing a number

To remove a phone number from a user
  1. Sign in to Office 365 with your work or school account.

  2. Go to the Office 365 admin center > Admin >Skype for Business.

  3. In the left navigation, go to Voice > then click Voice users.

  4. On the Voice users page, locate and select the user or users that you want to remove the phone number for.

  5. In the Action pane, under Assigned number click Remove.

  6. On the Remove selected assigned number? page, click Yes.

See Also

Emergency calling terms and conditions

Skype for Business Online PSTN services use terms

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