To ensure that when users join a meeting by using a phone, they are prompted to record their name, you need to enable the meeting entry and exit notifications in the Teams admin center. Here are the steps to follow:

Sign in to the Teams admin center with your admin credentials.

Go to  Meetings   >   Conference Bridges .

At the top of the Conference Bridges page, select  Bridge settings .

Enable the  Meeting entry and exit notifications  toggle.

Choose  Names  for the  Entry/exit announcement type .

Turn on the toggle for  Ask callers to record their name before joining a meeting .

Click  Save  to apply the settings.

To enable shared channel collaboration with microsoft.com, you need to use the Teams admin center to configure the channel policy and the cross-tenant access settings. Here are the steps to follow:

Sign in to the Teams admin center with your Microsoft 365 username and password 1 .

In the left navigation, go to Teams > Teams update policies.

Select an existing policy or create a new one by clicking Add.

In the Update policy pane, under Shared channels, turn on the toggles for Allow shared channel creation and Allow external shared channel participation. This will allow users to create shared channels and participate in shared channels created by microsoft.com.

Click Save and then Close.

In the left navigation, go to Org-wide settings > External access.

Under Cross-tenant access settings, click Manage settings.

In the Cross-tenant access settings pane, under Shared channels, select Allow specific domains and then enter microsoft.com in the box below. This will allow users to invite Microsoft contacts to shared channels created by your company.

Click Save.

Note: You also need to make sure that microsoft.com has configured their cross-tenant access settings to allow shared channel collaboration with your domain. See Collaborate with external participants in a channel 2 for more details.

To ensure that all unused teams expire and are deleted automatically, you need to configure a Microsoft 365 group expiration policy. This policy applies to teams because they are backed by groups. Here are the steps to follow:

Sign in to the Microsoft 365 admin center with your admin credentials.

Go to  Groups   >   Expiration .

Turn on the  Enable expiration  toggle.

In the  Group lifetime  box, enter  365  days or select it from the drop-down list. This means that the teams will expire 365 days from their creation date.

In the  Select group types to apply the policy  section, check the  Teams  box. You can also select other group types if you want.

In the  Choose how to handle owners of groups without owners  section, enter  adminLOD-Se551723.onmicrosoft.com  as the email address to receive notifications for the expiration of orphaned teams. You can also add more email addresses if you want.

Click  Save  to apply the policy.

That’s it. You have successfully configured a group expiration policy for teams. This policy will automatically delete the teams that are not renewed by their owners before the expiration date. You can also view and restore the deleted teams within 30 days from the  Deleted groups  page in the admin center.

To ensure that only users that are assigned the Global Administrator, User Administrator, or Guest Inviter roles can invite guest users to your company’s tenant, you need to configure the external collaboration settings in the Microsoft Entra admin center. Here are the steps to follow:

Sign in to the Microsoft Entra admin center with your admin credentials.

Expand  External identities , and then select  External collaboration settings .

Under  Guest invite settings , choose  Only users assigned to specific admin roles can invite guests .

Select  Save  to apply the settings.

To restrict external Teams communication for both calling and personal chat to only organizational users that use the microsoft.com domain, you need to use the Teams admin center to configure the external access settings. Here are the steps to follow:

Sign in to the Teams admin center with your Microsoft 365 username and password.

In the left navigation, go to Org-wide settings > External access.

Under External access, turn on the toggle for Users can communicate with other Skype for Business and Teams users.

Under Cross-tenant access settings, click Manage settings.

In the Cross-tenant access settings pane, under Calling and chat, select Allow specific domains and then enter microsoft.com in the box below. This will allow your users to communicate with Microsoft users via calling and chat.

Click Save.

Note: You also need to make sure that microsoft.com has configured their external access settings to allow communication with your domain. See Communicate with users from other organizations for more details.

To restrict Teams bandwidth by network range, you can use the Network Roaming Policy feature 1 . This feature allows you to define different media bit rate settings for different network locations based on the IP address ranges. Here are the steps to accomplish your task:

Create a new network roaming policy with the desired media bit rate settings. For example, you can use the following PowerShell cmdlet to create a policy named “MiamiPolicy” with a maximum bit rate of 1000 Kbps for audio and video:

New-CsTeamsNetworkRoamingPolicy -Identity " MiamiPolicy " -MaxMediaBitRateKb 1000

Assign the network roaming policy to the network range of the Miami office. You can use the following PowerShell cmdlet to assign the policy to the 10.10.10.0/24 network range:

New-CsTeamsNetworkRoamingPolicyAssignment -PolicyName " MiamiPolicy " -IPAddressRange " 10.10.10.0/24 "

Verify that the policy is applied correctly by using the Get-CsTeamsNetworkRoamingPolicyAssignment cmdlet. You should see something like this:

Identity : 10.10 . 10.0 / 24

PolicyName : MiamiPolicy

IPAddressRange : 10.10 . 10.0 / 24

EffectiveTime : 8 / 1 / 2023 1 : 18 : 24 PM

LastUpdateTime : 8 / 1 / 2023 1 : 18 : 24 PM

LastUpdateBy : admin@XXXXXXXXXXX.onmicrosoft.com

LastUpdateBySid : S -1-5-21-XXXXXXXXXX-XXXXXXXXXX-XXXXXXXXXX-XXXXX

Note: You may need to wait for some time for the policy to take effect.

To prevent guest users from calling your company’s Teams users, you need to turn off the calling capability for guests in the Teams admin center. Here are the steps to follow:

Sign in to the Teams admin center with your admin credentials.

Go to  Users   >   Guest access .

Turn off the  Make private calls  setting. This will disable the peer-to-peer calling feature for guests.

Click  Save  to apply the changes