Teams phone number assigned to another user

IBN 4,351 Reputation points

Hello Teams Community,

Please i need your help on this issue.

We are users of MS Teams phone solutions (Microsoft 365 Business Voice) which by Monday 7.2.2022. functioned neatly. On the specified date, we should have changed the person who is forwarding the calls and we receive the following error:

Microsoft.Teams.ConfigAPI.Cmdlets.internalSet-CsUserGenerated : 3xxxxxxxxxx is assigned to another user

For 4-5 months we've had the same treatment (there's a change of user on a regular basis) and everything's been neatly flicked.

The specified problem has already been reported to Microsoft by other users here:


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  1. Yuki Sun-MSFT 40,881 Reputation points

    Hi @IBN ,

    Considering that it's a public forum, I've edited your post above by removing the domain name and phone number involved for privacy concern.

    Then regarding the error you encountered, are you also using the same phone number for multiple users and assigning a different extension number for them?
    Does the error persist when the command is running against another user?

    Besides, as has been mentioned in the link you shared above, please try assigning the number using the Set-CsPhoneNumberAssignment cmdlet instead and see if it works.

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