You can turn on this setting, but it isn't available to your end users on the user settings page. The Block incoming caller ID setting allows for blocking the caller ID on incoming PSTN calls. If the phone number isn't in Microsoft Entra ID or a personal contact, the telco-provided display name is shown if it's available.

If the number is associated with a user or contact in Microsoft Entra ID or a personal contact, the Skype for Business and Teams clients shows the caller ID based on that information. Phone System shows the incoming external phone number as the caller ID. If the corresponding OnlinePstnGateway policy is configured with -ForwardPai $true, the P-Asserted-Identity (PAI) SIP header contains the real calling user.įor more information, see configure caller ID policies. You can't assign the following types of phone numbers for the outbound caller ID:Īny phone numbers that are classified as a user in your Calling Plan or Operator Connect's telephone number inventory.Īny on-premises telephone number via Direct Routing that is assigned to a user.Ī Skype for Business Server on-premises telephone number.įor Direct Routing, the phone number substitution and the CNAM are sent in the From Session Information Protocol (SIP) header. In this case, the outbound caller ID is blocked and Anonymous is used. The parameter EnableUserOverride has precedence over other settings in the CallingLineIdentity policy.įor example, assume a policy instance has substitution enabled with a resource account and EnableUserOverride is set and enabled by the user. The CNAM is sent on calls where the caller ID is substituted with LineURI, a resource account or service phone number, and when the caller is a Teams user.Įnd user control that overrides the caller ID policy. The CNAM can have a maximum of 200 characters, but downstream systems might support fewer characters. The Calling Party Name or CNAM set on the outbound PSTN call.įor example, when a user makes a call, you can change the caller ID to display your organization's main phone number and company name instead of the user's phone number. See Set-CsCallingLineIdentity for more details and examples. You should use CallingIDSubstitute = Resource instead.

You're no longer able to create new caller ID policies using CallingIDSubstitute = Service and existing caller ID policies with CallingIDSubstitute = Service are not being honored. The use of CallingIDSubstitute = Service has been deprecated.

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