Article ID: 2022515 - View products that this article applies to.
Although this article may apply to many different implementations of Microsoft Exchange, it is especially applicable in a deployment of the Microsoft Office 365 Dedicated.
When users try to send email messages to other users inside the same environment from a migrated Exchange mailbox, they receive 5.1.1 nondelivery receipts (NDRs).
For example, Dave@adatum.com sends an email message to Kelly@adatum.com but receives a 5.1.1 NDR.
During a migration phase (or because customers have decided not to migrate all users to Microsoft Online Services), mailboxes exist both in the managed environment and in the customer’s environment. To make correct mail flow easier, the appropriate properties have to be set in each environment.
If the user is NON-MIGRATED and is generating 5.1.1 NDRs:
If the user is MIGRATED and non-migrated users are receiving 5.1.1 NDRs:
If a user is misconfigured in the managed domain, resolve the situation as outlined here. However, note the SR number, and provide the SI number to the messaging SME to escalate to the technical leads in triage. It is very important to fix these issues quickly for customers and to resolve the tickets. However, we also have to make the appropriate teams aware of misconfigurations. These will be further investigated by the leads as appropriate. Make sure that you take detailed notes that indicate exactly which attribute was changed to resolve the issue.
Article ID: 2022515 - Last Review: March 5, 2013 - Revision: 11.0