Can't resend a delayed delivery message - Outlook

This article describes an issue that occurs when you are connecting to an Exchange Server 2013 mailbox by using an Online Mode Outlook profile.

I've been receiving Delivery is delayed messages from the CWSL Email Gateway after sending a message. Why? Is there a problem?

2565. Email from Outlook is being delayed by getting stuck in the 'Outbox'. : Help : ITS : University of Sussex

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