| Event Id | 173 |
| Source | MSExchangeMTA |
| Description | An error occurred while transferring message <message id> because the content type could not be downgraded. An X.400 API Association (XAPIA) <error code> reason code and <error code> diagnostic code were returned. [<value> <value> <value> <value>] (14) |
| Event Information | The message transfer agent (MTA) has determined that this probe object has a 1988-specific content type, and therefore it cannot be sent over a 1984 X.400 backbone. This message was not originated by a Microsoft Exchange Server client because Microsoft Exchange Server does not send probes. |
| Reference Links | Microsoft product: Exchange Version: 6.5.6940.0 Event Source: MSExchangeMTA Event ID: 173 |
Catch threats immediately
We work side-by-side with you to rapidly detect cyberthreats
and thwart attacks before they cause damage.