We are using Dynamics 365 On Premise (version 8.2.3) and occasionally when a mailbox is created, even though the email settings are correctly set, the emails are not processed for the mailbox. In our case we are using the router to process emails. If load the data from my CRM instance in my router, I do not see the mailboxes. However, when I set all three email settings to "None," wait 5 minutes, and the reapply the default email settings, the emails are correctly processed by the router.
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