To prevent unauthenticated users from joining Teams meetings, you need to turn off the anonymous meeting join feature in Teams. Here are the steps to follow:

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

Go to  Meetings   >   Meeting settings .

Under  Participants , set  Anonymous participants can join a meeting  to  Off .

Click  Save  to apply the changes.

To configure a virtual receptionist for your company’s main office, you can use the Teams admin center to create and assign an auto attendant. An auto attendant is a voice menu system that allows callers to be transferred to an extension or a queue without speaking to an operator or receptionist. Here are the steps to create and assign an auto attendant that meets your requirements:

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

In the left navigation, go to Voice > Auto attendants.

Click Add (+) to create a new auto attendant.

In the Basics tab, enter a name and an optional description for the auto attendant, such as “Main Office Receptionist”.

Under Phone number, select Assign and then choose a service number from the list or click Add new number to get a new one. A service number is a type of phone number that can handle hundreds of simultaneous calls and is used for services such as audio conferencing, auto attendants, and call queues.

Click Apply and then Next.

In the Greeting and menu tab, under Greeting, select Custom and then click Upload audio file to upload a recorded greeting message for the callers, such as “Welcome to Microsoft. Please listen carefully to the following options.”

Under Menu options, click Add (+) and then select Key press from the drop-down menu.

In the Key press box, enter 1 and then select Dial by name from the Action drop-down menu. This will allow callers to press 1 for the company directory to lookup by name.

Click Add (+) again and then select Key press from the drop-down menu.

In the Key press box, enter 0 and then select Play audio file from the Action drop-down menu. This will allow callers to press 0 to hear the company address.

Click Upload audio file and then upload a recorded message with the company address, such as “Our main office is located at 1 Microsoft Way, Redmond.”

Under Menu options, turn on the toggle for Repeat menu until caller hangs up or presses #. This will offer the same menu at all times.

Click Next.

In the Business hours tab, under Business hours, select 24/7 from the drop-down menu. This will make the auto attendant available at all times.

Click Next.

In the Review tab, review your settings and then click Save.

Now, you have configured a virtual receptionist for your company’s main office that meets your requirements.

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 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

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 ensure that the Approvals app is pinned to the top of the app bar of the Teams client for all members of the Retail team, you need to create a custom app setup policy and assign it to the Retail team members. Here are the steps to follow:

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

Go to  Teams apps   >   Setup policies .

Select  Add .

Provide a name and description for the policy, such as Retail App Policy.

Optionally, turn on  User pinning  to allow users to pin apps and change the order of the pinned apps.

Under  Pinned apps , select  Add apps .

Search for the Approvals app and add it to the list of pinned apps. You can also add other apps that you want to pin for the Retail team members.

Click  Save  to create the policy.

To assign the policy to the Retail team members, go to  Users  on the left menu and select the users that belong to the Retail team. You can use the filters or the search box to find them.

On the right pane, under  Policies , select  Edit  next to  App setup policy .

Choose the Retail App Policy from the drop-down list and click  Apply .

To acquire a dedicated Microsoft dial-in bridge number from either 431 or 343 area codes in Canada, you need to use the Teams admin center to request and assign a service number. A service number is a type of phone number that can handle hundreds of simultaneous calls and is used for services such as audio conferencing, auto attendants, and call queues. 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 Voice > Phone numbers.

Click Add (+) and then select New service numbers.

In the New service numbers pane, select the country or region as Canada, the number type as Toll or Toll-free, and the location as Manitoba (for 431 area code) or Ontario (for 343 area code).

Enter the quantity of numbers that you need and then click Next.

Review your order details and then click Submit request.

Wait for an email confirmation that your request has been processed. This may take up to 24 hours.

After you receive the confirmation email, go back to the Teams admin center and click Refresh on the Phone numbers page. You should see the new service numbers that you requested.

To assign a service number to your audio conferencing bridge, go to Meetings > Conference bridges and then click Edit next to Default toll or toll-free number.

In the Edit default toll or toll-free number pane, select one of the new service numbers that you acquired from the drop-down menu and then click Apply.

Now, you have acquired and assigned a dedicated Microsoft dial-in bridge number from either 431 or 343 area codes in Canada.

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.