Improved Error Handling when Connecting to Exchange with Managed Identity (#186)

[raandree]

This pull request includes several changes to improve error handling and code clarity in the MSCloudLoginAssistant module. The most important changes include adding try-catch blocks to handle potential exceptions, improving verbose logging, and updating conditional checks for string values.

Error Handling Improvements:

• Modules/MSCloudLoginAssistant/MSCloudLoginAssistant.psm1: Added try-catch blocks to handle CommandNotFoundException and other exceptions when retrieving the initial domain using Get-MgDomain or Get-MgBetaDomain. This ensures that appropriate error messages are logged when exceptions occur.

Logging Enhancements:

• Modules/MSCloudLoginAssistant/MSCloudLoginAssistant.psm1: Enhanced verbose logging to include the exception message when failing to get the domain, providing more context for troubleshooting.

Code Clarity:

• Modules/MSCloudLoginAssistant/Workloads/ExchangeOnline.psm1: Updated the conditional check to use [string]::IsNullOrEmpty for better readability and to handle both null and empty string cases. Additionally, added error handling to log an error message and stop execution if the organization name cannot be retrieved.

This PR fixes #186.

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This change is 

[ykuijs]

Hi @raandree, we just merged a large PR that now is causing some merge conflicts. Can you please update with dev and resolve the conflicts?

[raandree]