How to mask/unmask external/internal PSTN user phone number that is joining Teams meeting

Microsoft recently added privacy configuration for the PSTN caller dialing in to the Teams Meeting through audio conferencing. By default, external phone is masked for internal participants. 

It's a global configuration.

Tenant Admin Configuration (GUI)-

• Login to Microsoft Teams Admin Center, select "Meetings",
• Navigate to "Conference Bridges" in the left side,
• Select "Bridge Settings" and choose "Display masked caller-ids", it will allow you to choose the following:
• To participants outside your organization
• To all meeting participants
• Disabled

• To participants outside your organization - Phone numbers are masked only from external participants. The participants who belong to the meeting organizer's tenant still see the full phone number.
• To all meeting participants - Phone numbers are masked from everyone in the meeting except the organizer.
• Disabled - Phone numbers are unmasked, which makes them visible to everyone in the meeting.

Tenant Admin Configuration through PowerShell -

To mask the external phone number/participant in the meeting

Set-CsOnlineDialInConferencingTenantSettings -MaskPstnNumbersType "MaskedForExternalUsers" 

To mask the phone number for all participants except organizer

Set-CsOnlineDialInConferencingTenantSettings -MaskPstnNumbersType "MaskedForAllUsers"

To Disable the phone number mask to make it visible to everyone.

Set-CsOnlineDialInConferencingTenantSettings -MaskPstnNumbersType "NoMasking"