Adding, changing, or removing an emergency address for your organization
Emergency addresses are associated with phone numbers in your organization so that emergency first responders can receive accurate location information for the phone numbers you've deployed to users in your organization.
You can create multiple emergency addresses (and should) so that you have one for each office location where you're deploying associate phone numbers.
To create an emergency address, go to the Teams admin center at https://admin.teams.microsoft.com and select Locations | Emergency addresses from the left-hand menu. You may already see that a default location has been added for the one you used when you set up your tenant. To create a new address, click Add.
For each emergency address, you must name it and specify the location by lookup or manual entry, as shown in the following screenshot: