SAP Knowledge Base Article - Preview

3287627 - Authentication Error when connecting to Microsoft 365 Outlook via Mail Adapter


When connecting to MS 365 Outlook via a Mail Adapter in CPI, the connection is failing with the following error - 

  • javax.mail.AuthenticationFailedException: 535 5.7.3 Authentication unsuccessful



  • SAP Cloud Integration
  • SAP Integration Suite
  • SAP Business Technology Platform


SAP Integration Suite 1.0


SAP Cloud Integration, SAP Integration Suite, SAP Cloud Platform Integration, Cloud Platform Integration, SAP CPI, CPI, SCPI, HCI, outlook, office, 365, office365, IMAP, SMTP, authentication, STARTTLS, mail adapter, sender, receiver, 535 5.7.3 , KBA , LOD-HCI-PI-CON-SOAP , SOAP Adapter , Problem

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