For 5+ years I’ve had our incoming email Account configured using the Exchange/Office365 option and has worked without a hitch. 2 weeks ago I updated our software to the latest version, 12.7 and still had no issues with the Help Desk Processing incoming emails. Late afternoon this past Thursday the Help Desk stopped processing incoming emails throwing the error, “unable to find valid certification path to requested target.” Which is assume is relate to the email Account in O365.
I worked with Support for nearly an hour, seemingly just “trying stuff”; they definitely did not know the cause nor the solution. This surprises me as I assume there must be many clients using this configuration. The end result was switching the Incoming Email Account configuration to IMAP, which does work. What I’d like to know is why this stoped working? I assume it’s something that has changed on Microsoft’s end and from my reading/searches it seems like I need to either add the O365 Cert or my Help Desk Server Cert to either the Help Desk Server Cert Store or the Help Desk Cert Store but am unsure and would like to know the exact specific solution if anyone has insight.
Thanks - Mark