Bug Report: Azure CLI throws “Found multiple accounts with the same username” error Command/Context

[jefersonbraga]

Describe the bug

Found multiple accounts with the same username '': [
{
'home_account_id': '',
'environment': 'login.microsoftonline.com',
'username': '',
'account_source': 'urn:ietf:params:oauth:grant-type:device_code',
'authority_type': 'MSSTS',
'local_account_id': '',
'realm': 'organizations'
},
{
'home_account_id': '',
'environment': 'login.microsoftonline.com',
'username': '',
'account_source': 'urn:ietf:params:oauth:grant-type:device_code',
'authority_type': 'MSSTS',
'local_account_id': '',
'realm': ''
}
]

Related command

az login --use-device-code --tenant

Errors

Found multiple accounts with the same username

Issue script & Debug output

When attempting to authenticate using Azure CLI with device-code login, the CLI fails with an error stating that multiple accounts with the same username were found. The login process stops instead of allowing the user to select a tenant or continuing normally.

This occurs even in a clean environment with no existing Azure CLI profile.

Expected behavior

Expected Behavior
Azure CLI should either:

successfully authenticate, or

allow the user to choose which account/tenant to use, or

automatically handle users that exist across multiple tenants.

Actual Behavior
Login fails with an error and does not allow the user to proceed.

Steps to Reproduce

Run az login --use-device-code

Complete authentication in the browser

CLI throws the above error and login does not complete

Environment

OS: (e.g., Windows / macOS / Linux)

Azure CLI version: (az version)

No custom configuration

Additional Notes
Deleting the Azure profile folder (e.g., ~/.azure/) and re-logging does not resolve the issue.
The error happens even on a clean environment.

Environment Summary

azure-cli 2.76.0 *

core 2.76.0 *
telemetry 1.1.0

Dependencies:
msal 1.33.0b1
azure-mgmt-resource 23.3.0

Python location 'C:\Program Files\Microsoft SDKs\Azure\CLI2\python.exe'
Config directory 'C:\Users\jefer.azure'
Extensions directory 'C:\Users\jefer.azure\cliextensions'

Python (Windows) 3.12.10 (tags/v3.12.10:0cc8128, Apr 8 2025, 12:21:36) [MSC v.1943 64 bit (AMD64)]

Legal docs and information: aka.ms/AzureCliLegal

Additional context

No response

[azure-client-tools-bot-prd]

Hi @jefersonbraga,

2.76.0 is not the latest Azure CLI(2.79.0).

If you haven't already attempted to do so, please upgrade to the latest Azure CLI version by following https://learn.microsoft.com/en-us/cli/azure/update-azure-cli.

[yonzhan]

Thank you for opening this issue, we will look into it.

[github-actions]

Here are some similar issues that might help you. Please check if they can solve your problem.

• Found multiple accounts with the same username 'myemail@sierac.fr' #31875
• Issues with az login when your email address has both an Entra ID and a MS account tied to it #31156
• Found multiple accounts with the same username #28166
• Found multiple accounts with same username #20168
• Multiple Accounts with same username #20272

---

Possible solution (Extracted from existing issue, might be incorrect; please verify carefully)

Solution 1:

To get unblocked, please clear Azure CLI's accounts and log in again with only one account (Microsoft Account or AAD Account):

az account clear
az login

Later if you want to log in again, please make sure to select the same account, but not the other one.

Reference:

• Found multiple accounts with same username #20168 (comment)
• Found multiple accounts with same username #20168 (comment)
• Found multiple accounts with same username #20168 (comment)

Solution 2:

Delete the MSAL token cache file to resolve the issue. On macOS/Linux, run:

rm ~/.azure/msal_token_cache.json

Then run az login again.

Reference:

• Found multiple accounts with same username #20168 (comment)
• Found multiple accounts with same username #20168 (comment)
• Found multiple accounts with same username #20168 (comment)

Solution 3:

On Ubuntu 22.04, removing all JSON files in the .azure directory resolves the issue:

rm ~/.azure/*.json

Then run az login again.

Reference:

• Found multiple accounts with same username #20168 (comment)
• Found multiple accounts with same username #20168 (comment)

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