Unable to login to AWS IAM

If you're unable to log in to AWS IAM and receiving an "Authentication failed" error, there are several steps you can take to troubleshoot and resolve the issue:

1. Double-check your credentials: Ensure you're entering the correct Account ID (12 digits), IAM username, and password. Remember that these are case-sensitive.

2. Verify the sign-in method: If you're using IAM Identity Center (formerly AWS Single Sign-On), you need to use a specific access portal URL instead of the standard IAM user sign-in page. Check with your AWS administrator for the correct access portal URL, which typically looks like https://d-xxxxxxxxxx.awsapps.com/start.

3. Clear browser cache and cookies: Sometimes, stale or corrupted data can cause login issues. Try clearing your browser's cache and cookies or use an incognito/private browsing window.

4. Check time and date settings: Ensure your device's time and date settings are correct, as AWS authentication is sensitive to time discrepancies.

5. Verify Multi-Factor Authentication (MFA): If MFA is enabled for your account, make sure you're providing the correct MFA code when prompted.

6. Use a different browser: Try logging in with a different web browser to rule out browser-specific issues.

7. Disable browser extensions: Temporarily disable any browser extensions, especially ad blockers or privacy extensions, that might interfere with the login process.

8. Check account and user status: Verify with your AWS administrator that your IAM user account is active and hasn't been deactivated or had its permissions changed recently.

If you've tried these steps and are still unable to log in, contact your AWS account administrator or AWS Support for further assistance. They can help verify your credentials and investigate any potential account-specific issues that might be preventing your access.
Sources
Unable to sign-in IAM User | AWS re:Post
First time log in to AWS console. Unable to log in | AWS re:Post
Cant sign in with new AWS sign method | AWS re:Post

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