You can manage caller ID policies by going to Voice > Caller ID policies in the Microsoft Teams admin center. You can use the global (Org-wide default) policy or create and assign custom policies. Users in your organization automatically get the global policy unless you create and assign a custom policy.

Create a custom caller ID policy

In the left navigation of the Microsoft Teams admin center, go to Voice > Caller ID policies. (A)

Select Add.

Enter a name and description for the policy.

Turn on or off Block incoming caller ID and Override the caller ID policy. (E)

Enter a Calling Party Name.

Under Replace the caller ID with, set which caller ID is displayed for users by selecting one of the following: (D)

User's number: Display the user's number.

Anonymous: Display the caller ID as Anonymous.

Resource account: Set a resource account associated with an Auto Attendant or Call Queue.

If you choose Resource account, you're prompted to specify a resource account for the next field, called Replace the caller ID with this resource account. Only resource accounts with an assigned phone number will be displayed. If you just assigned a phone number to the resource account, it may take a few minutes before the resource account is available for selection.

7. Select Save.

https://learn.microsoft.com/en-us/microsoftteams/caller-id-policies