ERP Application SMTP Authentication Unrecognized

Frank Romano Jr - Admin 20 Reputation points


New to MS365 and Azure AD. Ongoing MS365 migration taking place. I have an ERP application that allows reports to be sent from an ERP application via SMTP settings configured in the application itself. When we began migrating from my On-Prem Exchange Server for some users, they could no longer email these report. The application mailtext.log shows the following error: SmtpCmdResp: 504 5.7.4 Unrecognized authentication type. Some research indicates I may need to use Azure AD > Security > Conditional Access to modify policy for my legacy ERP application. Does anyone know where I should begin my troubleshooting/testing?

Thank you.

Microsoft 365
Microsoft 365
Formerly Office 365, is a line of subscription services offered by Microsoft which adds to and includes the Microsoft Office product line.
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Microsoft Exchange Online
Microsoft Exchange Hybrid Management
Microsoft Exchange Hybrid Management
Microsoft Exchange: Microsoft messaging and collaboration software.Hybrid Management: Organizing, handling, directing or controlling hybrid deployments.
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  1. Jarvis Sun-MSFT 10,176 Reputation points Microsoft Vendor

    Hi @Frank Romano Jr - Admin ,

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