You have a Teams Phone deployment.

Microsoft MS-721 Question Answer

You need to enable external users to configure their emergency address manually in the Teams client.

What should you do?

Enable Location-Based Routing.

Create a new emergency calling policy that has external location lookup mode enabled.

Create a new emergency call routing policy that has dynamic emergency calling configured.

From Networks & locations, add the external subnets of the users.

MS-721 PDF/Engine

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