Need help with email authentication error using app password for ***********

Question

Dear Support Team,

I am encountering an authentication error when attempting to send emails using the app password for my Microsoft 365 organization account (***********) via PHP code. I have successfully created the app password, but the authentication process is still failing despite using it in the correct configuration.

Could you please assist me in troubleshooting this issue? I would appreciate any guidance or additional steps I might need to follow to resolve this.

Thank you for your help.

Answer 1

Hi, careers2

Good day!

Thanks for posting into our community.

According to your description, the issue of your concern that relates to the authentication error when attempting to send emails.

As Microsoft has numerous product lines and corresponding specialized technical teams, regarding the issue that is troubling you, we sincerely refer you to the right place in here - Search | Microsoft Learn  which there's an expert team who dedicating into Microsoft Authentication with rich experience and more resources. We believe they would conduct in-depth of the given issue and provide you an appropriate suggestion for you.

Moreover, for saving your time, you also can contact Microsoft Data Protection team directly - Find Microsoft 365 for business support phone numbers by country or region - Microsoft 365 admin | Microsoft Learn. (Ctrl+F4 and type your area's name.)

Once they verified your identification, they would be able to assist you to access on your account.

If you continue to experience issues, please feel free to contact us and we will find other possible solutions for you.

Thanks for your precious time and your understanding would be highly appreciated.

Hope you all the best!

Microsoft Community Moderator.