Error "Failed to send message. Cannot get the full name or e-mail address of user"

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ISSUE

When sending an email notification, the workflow might fail with the following error: 

Failed to send message. Cannot get the full name or e-mail address of user "<username here>".

ERROR CODE

RESOLUTION

Ensure that the username is in Active Directory and that the user account has a valid email address configured.

ADDITIONAL INFORMATION

The workflow engine is unable to find that username in Active Directory, or the user account does not have a valid email address configured.

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