Delivery Failed From Office 365 Mailbox To On-Premises Exchange Mailbox
In an Exchange 2010 SP3 Hybrid deployment with Office 365, a client noted that they were unable to send email from their Office 365 mailbox to an on-premises mailboxes. The user in Office 365 received an undeliverable message stating that Delivery has failed to these recipients or groups and the email address wasn’t found at the destination domain. That was not the case as there certainly was … Read the rest “Delivery Failed From Office 365 Mailbox To On-Premises Exchange Mailbox”