Your company is planning to use Azure DevOps. The company wants to ensure that devices can access the Azure DevOps environment. But that devices must be connected to their on-premises network. Which of the following can be used to implement this requirement?

Answer options:

A.Make sure to assign Stakeholder access level to all users.
B.Configure risky sign-ins in Azure Active Directory.
C.Configure Project security in Azure DevOps.
D.Configure conditional access in Azure Active Directory.

Answer – D 
You can configure conditional access to Azure Active Directory. It will ensure that only company-authenticated devices are used to access Azure-based resources. 
The Microsoft documentation mentions the following on conditional access- 

The other options are invalid since they cannot be used to control access based on devices. 
For more information on Conditional access, please refer to the following link 

https://docs.microsoft.com/en-us/azure/active-directory/conditional-access/overview