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>".
RESOLUTION
- Ensure that the username is in Active Directory and that the user account has a valid email address configured.
- Ensure that the AD account is enabled.
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, or the AD account is disabled.