Article ID: 2784785 - View products that this article applies to.
When you send email messages by using Microsoft Outlook in Office 365, you may experience one or both of the following issues:
Symptom 1: You receive non-delivery reports (NDRs)Email messages or meeting invitations are not delivered successfully. For example, you receive an NDR that resembles the following:
Generating server: <server name>.local
#550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found ##
Symptom 2: The AutoComplete feature in Outlook does not work as expectedWhen you create a new email message and then type a name in the To line, the user's name is auto-populated. However, when you double-click the name, you experience one of the following issues:
These issues may occur if one of the following conditions is true:
To resolve these issues, follow these steps:
This issue most frequently occurs when messages are migrated by using a method that does not correctly update the underlying X.500 distinguished name information for the original recipients of the message. The most common culprits in this scenario are .pst migrations.
For more information, see the following resources:
Still need help? Go to the Office 365 Community
Article ID: 2784785 - Last Review: February 4, 2015 - Revision: 9.0