Dev License: This installation of WHMCS is running under a Development License and is not authorized to be used for production use. Please report any cases of abuse to abuse@whmcs.com

This is a known issue with Outlook 2013 connecting via IMAP. Symptoms: Mail isn't populating...
Outlook 2016/2019 IMAP: Mail Is Not PopulatingThis is a known issue with Outlook 2016/2019 connecting via IMAP. Navigate to File >...