I setup a shared inbox in Office 365. The emails in that shared inbox are converted automatically to a Case. This is working fine, though in some cases the emails are not converted to a case. This problem seems random as an email from an existing contact sometimes does convert to a case.
Though another email, with a new and different subject line, not being a reply to an earlier email or case, is not converted to an email.
This means engineers cannot rely on Dynamics to show all their cases.
Would anybody have an idea where to look for a solution.
Dynamics CRM online
Office 365 online
Incoming email is set to Server-side Synchronization or Email Router
Outgoing email is set to Server-side Synchronization or Email Router
I did find 1 alert with email server error code: Web server returned 3 ReceiveFailure exception.