az login failed when using authenticated proxy #30503
Description
Describe the bug
Raised the ticket on behalf of customer:
The customer deployed the authenticated proxy via the guidance: https://learn.microsoft.com/en-us/azure/developer/python/sdk/azure-sdk-configure-proxy?source=recommendations&tabs=cmd
When the cx is running the command below to connect to Azure via service principal, the connectivity to Azure would fail with error.
az login --service-principal -u $client_id -p="$client_secret" --tenant $TenantId
Per the customer's local test, the issue only happens when connecting to Azure via the authenticated proxy that triggers kerberos/NTLM authentication.
If he connects to Azure via the non-auth proxy, the connectivity to Azure succeeds.
Ask: Is it supported to connect to Azure via authenticated proxy that triggers Kerberos/NTLM authentication? If yes, any idea on the error message thrown?
(In Github there is a ticket raised in 2021 with the similar issue: #16980. Not sure if the feature is supported now. )
Related command
When the cx is running the command below to connect to Azure via service principal:
az login --service-principal -u $client_id -p="$client_secret" --tenant $TenantId
Errors
Issue script & Debug output
Per the customer's local test, the issue only happens when connecting to Azure via the authenticated proxy that triggers kerberos/NTLM authentication.
If he connects to Azure via the non-auth proxy, the connectivity to Azure succeeds.
Expected behavior
Connecting to Azure via the authenticated proxy that triggers kerberos/NTLM authentication is succeeded.
Environment Summary
The customer deployed the authenticated proxy via the guidance: https://learn.microsoft.com/en-us/azure/developer/python/sdk/azure-sdk-configure-proxy?source=recommendations&tabs=cmd
Additional context
No response