How to get an Azure Active Directory username in Windows Powershell?

Question

I'm trying to get the current Windows username & domain from Powershell on a Windows 10 Azure Active Directory (AAD) joined machine.

I've tried the tips at this question, but none of them seem to work for Azure Active Directory-joined machines.

e.g. for the user: Jonathan Doe, [email protected] you'll get only the users' proper name & AzureAD (not their username or 'real' domain):

$env:UserName --> JonathanDoe
$env:UserDomain --> AzureAD
[System.Security.Principal.WindowsIdentity]::GetCurrent().Name --> AzureAD\JonathanDoe

Does anyone know how to get any part of the user's actual credential or specific Azure AAD domain? (e.g. john or example.com or ideally [email protected])

Answer 1

You can run the following command in PowerShell, the output will display the user name in UPN format.You can get both of the username and domain name from that.

whoami.exe /UPN

In addition, the program 'whoami.exe' provides many other parameters for getting additional information about current user. You can type the following command for more details about 'whoami.exe'.

whoami.exe /?

Answer 2

I'm not sure how official this is, but I found a link in the registry that contains the username which is [email protected]. This was under HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\IdentityStore\Cache\xxx\IdentityCache\xxx. The key name was UserName. You can use the built-in powershell registry provider to navigate to this registry entry.