Event ID - 2026

Event Id2026
SourceMSExchangeIS Private
DescriptionThe delivery of a report failed due to error 00000BB8. The report has been deleted.
Event InformationAccording to Microsoft:
The delivery report has an invalid X.400 format. This happens when the message transfer agent (MTA) that receives the message over the 1984 link (the "Connector Server") routes it to another MTA in the site for delivery, and the recipient has an Alternative Recipient set. The delivering MTA delivers the message correctly and creates the delivery report. However, the Actual Recipient attribute in the report contains only the Directory Name, and not the O/R Address of the recipient. When the report reaches the connector server, it must be downgraded to 1984 format for transfer over the connector. The Directory Name is removed, and the Actual Recipient attribute consists of only an empty Standard Attributes set, an invalid structure.
To resolve this problem, obtain the latest service pack for Exchange Server version 5.5.Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 5.5. This problem was first corrected in Exchange Server 5.5 Service Pack 2.
Reference LinksXCON: Delivery Report Discarded Over 1984 X.400 Connector X.400 Connector

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