Perform Microsoft OAuth 2.0 Authorization Using LabVIEW

Issue Details

Solution

You can leverage the Microsoft Azure Active Directory service and the .NET API it exposes to perform the authorization.
Follow these steps:

1. Install Microsoft.IdentityModel.Clients.ActiveDirectory package using the NuGet.exe CLI. This package contains the binaries of the Active Directory Authentication Library (ADAL). ADAL provides easy to use authentication functionality for your .NET based client (in this case, NI LabVIEW) by taking advantage of Azure Active Directory.
2. Register the previously installed .NET DLL (Microsoft.IdentityModel.Clients.ActiveDirectory.dll) in the Global Assembly Cache (GAC).
3. You are now ready to use this library in LabVIEW using Constructor Nodes, Invoke Nodes (.NET), and Property Nodes (.NET). 
4. Register a native app in the Azure portal.
5. Refer to the snippet below to generate a AccessToken.

Figure 1: VI Snippet can directly be dragged and dropped into your block diagram 
 

6. The AcquireTokenAsync() method generates a prompt asking the user for their credentials, as shown below.

Figure 2: User Credentials Prompt

7. If the user has access to the Tenant (configured in Azure Portal), they will be able to go ahead and execute the rest of their VI and generate an access token which can then be used to access other Azure API such as Blob and Queues.

Additional Information