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Office 365 configured as the email server for an Appian cloud site fails to send emails. The following error can be seen in the application server log
javax.resource.spi.work.WorkCompletedException: com.appiancorp.process.engine.EmailSendException: Could not send email [from=<FROM_DDRESS>, to=<TO_ADDRESS>, subject=<SUBJECT> ... Caused by: com.appiancorp.process.engine.EmailSendException: Could not send email [from=<FROM_ADDRESS>, to=<TO_ADDRESS>, subject=<SUBJECT> ... Caused by: com.sun.mail.smtp.SMTPSendFailedException: 554 5.2.0 STOREDRV.Submission.Exception:SendAsDeniedException.MapiExceptionSendAsDenied; Failed to process message due to a permanent exception with message Cannot submit message
Office 365 is blocking emails with the address specified in the 'from' field of the above error message. One possible reason This is often the Appian Cloud site's system email address.
There are two possible actions that can resolve the issue;
This article applies to all versions on Appian Cloud
Last Reviewed: March 2020
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