In the Teams client, the dial pad enables users to access Public Switched Telephone Network (PSTN) functionality. The dial pad is available for users with a Phone System license, provided they're configured properly. All of the following conditions must be met for the dial pad to appear:
- The user has a Teams license assigned.
- The user has a Teams Phone System (MCOEV) license assigned.
- The user has Microsoft Calling Plan, Operator Connect, or is enabled for Direct Routing.
- The user has Enterprise Voice enabled.
- The user is homed online and not in Skype for Business on-premises.
- The user has Teams Calling Policy enabled with AllowPrivateCalling = True.
For more details, you could refer to: Dial pad is missing in Teams.
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