Some windows users report that, especially with Microsoft Outlook, there is a warning to validate the ssl certificate when configuring its own box. This is a single validation problem that does not affect the operation of the pec and does not depend on the server. To remove the Outlook warning you can follow the following instruction post directly from the microsoft site:
https://support.microsoft.com/en-us/kb/276597
For more information, open a ticket to contact the technical department.
