An error occurred while transferring in message because the directory name could not be expanded to an O/R address. An X.400 API Association (XAPIA) reason code and diagnostic code were returned. [ ] (14)

Details
Product: Exchange
Event ID: 178
Source: MSExchangeMTA
Version: 6.5.6940.0
Component: Microsoft Exchange Message Transfer Agent
Message: An error occurred while transferring in message <message id> because the directory name could not be expanded to an O/R address. An X.400 API Association (XAPIA) <error code> reason code and <error code> diagnostic code were returned. [<value> <value> <value> <value>] (14)
   
Explanation

This event is mainly seen in Exchange Server 5.5 environments and may occur if the directory synchronization object does not have a valid X.400 proxy address.

   
User Action

In the E-mail Addresses dialog box of the directory synchronization object, type a valid X.400 proxy address.

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