1.  Topic 1, Contoso, Ltd 
Case study
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To start the case study
Background
The company does a lot of business with the following partner companies. Contoso employees are not able to communicate with these partners by using Microsoft Teams.
The company currently uses Skype for Business (SfB) as a collaboration tool. The company wants to migrate to Microsoft Teams. Contoso is beginning a pilot project as part of a Microsoft Teams upgrade. You determine that some offices do not have calling plan licenses. 
Current environment
Network environment
Microsoft 365
Microsoft Teams
Requirements
Sales department employees must be able to dial international numbers. Other department employees must be prevented from dialing international numbers.
Emergency calling
All local calls for Redmond (country code and region code is +1425) should be dialed without having to put the +1425 in front of the number. 
Security
Teams channels
Meetings and live events
Issues
User2
User3
User4
Sales team
Conditional Access policy
You review the output from the cmdlets: 
Teams performance
You review the following log entries: 
You need to configure team settings specific to all departments' needs.