Edit pass on Identity README / TSG (Azure#48520)

Author: scottaddie

sdk/identity/Azure.Identity/README.md

@@ -31,12 +31,6 @@ To authenticate in Visual Studio, select the **Tools** > **Options** menu to lau
 
 ![Visual Studio Account Selection][vs_login_image]
 
-#### Authenticate via Visual Studio Code
-
-Developers using Visual Studio Code can use the [Azure Account extension](https://marketplace.visualstudio.com/items?itemName=ms-vscode.azure-account) to authenticate via the editor. Apps using `DefaultAzureCredential` or `VisualStudioCodeCredential` can then use this account to authenticate calls in their app when running locally.
-
-It's a [known issue](https://github.com/Azure/azure-sdk-for-net/issues/30525) that `VisualStudioCodeCredential` doesn't work with [Azure Account extension](https://marketplace.visualstudio.com/items?itemName=ms-vscode.azure-account) versions newer than **0.9.11**. A long-term fix to this problem is in progress. In the meantime, [authenticate via the Azure CLI](#authenticate-via-the-azure-cli).
-
 #### Authenticate via the Azure CLI
 
 Developers coding outside of an IDE can also use the [Azure CLI][azure_cli] to authenticate. Apps using `DefaultAzureCredential` or `AzureCliCredential` can then use this account to authenticate calls in their app when running locally.
@@ -199,7 +193,6 @@ Not all credentials require this configuration. Credentials that authenticate th
 |[`DeviceCodeCredential`][ref_DeviceCodeCredential]|Interactively authenticates a user on devices with limited UI. | [Device code authentication](https://learn.microsoft.com/entra/identity-platform/v2-oauth2-device-code)|
 |[`InteractiveBrowserCredential`][ref_InteractiveBrowserCredential]|Interactively authenticates a user with the default system browser. | [OAuth2 authentication code](https://learn.microsoft.com/entra/identity-platform/v2-oauth2-auth-code-flow)|
 |[`OnBehalfOfCredential`][ref_OnBehalfOfCredential]|Propagates the delegated user identity and permissions through the request chain. | [On-behalf-of authentication](https://learn.microsoft.com/entra/identity-platform/v2-oauth2-on-behalf-of-flow)|
-|[`UsernamePasswordCredential`][ref_UsernamePasswordCredential]|**Deprecated** Authenticates a user with a username and password. | [Username + password authentication](https://learn.microsoft.com/entra/identity-platform/v2-oauth-ropc)|
 
 ### Authenticate via development tools
 
@@ -209,7 +202,6 @@ Not all credentials require this configuration. Credentials that authenticate th
 |[`AzureDeveloperCliCredential`][ref_AzureDeveloperCliCredential]|Authenticates in a development environment with the Azure Developer CLI. | [Azure Developer CLI Reference](https://learn.microsoft.com/azure/developer/azure-developer-cli/reference)|
 |[`AzurePowerShellCredential`][ref_AzurePowerShellCredential]|Authenticates in a development environment with the Azure PowerShell. | [Azure PowerShell authentication](https://learn.microsoft.com/powershell/azure/authenticate-azureps)|
 |[`VisualStudioCredential`][ref_VisualStudioCredential]|Authenticates in a development environment with Visual Studio. | [Visual Studio configuration](https://learn.microsoft.com/dotnet/azure/configure-visual-studio)|
-|[`VisualStudioCodeCredential`][ref_VisualStudioCodeCredential]|Authenticates as the user signed in to the Visual Studio Code Azure Account extension. | [VS Code Azure Account extension](https://marketplace.visualstudio.com/items?itemName=ms-vscode.azure-account)|
 
 > __Note:__ All credential implementations in the Azure Identity library are threadsafe, and a single credential instance can be used by multiple service clients.
 

sdk/identity/Azure.Identity/TROUBLESHOOTING.md

@@ -172,6 +172,7 @@ DefaultAzureCredentialOptions options = new
 
 | Error Code | Issue | Mitigation |
 |---|---|---|
+|AADSTS50076|Multifactor authentication (MFA) is enabled on your Entra tenant, and the username + password flow is incompatible with MFA.|Use a different credential, per the guidance at [Planning for mandatory MFA: Client libraries](https://aka.ms/azsdk/identity/mfa).|
 |AADSTS50126|The provided username or password is invalid|Ensure the `username` and `password` provided when constructing the credential are valid.|
 
 ## Troubleshoot `WorkloadIdentityCredential` authentication issues