Microsoft KB Archive/288826

= Error Message: &quot;Error 503&quot; Occurs in Mobile Information Server Carrier Edition =

Article ID: 288826

Article Last Modified on 10/28/2006

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APPLIES TO


 * Microsoft Mobile Information Server 2001 Enterprise Edition

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This article was previously published under Q288826



SYMPTOMS
When you are running Microsoft Mobile Information Server Carrier Edition, and you place a limit on the Message Queuing queue that is responsible for sending messages to the Short Message Service (SMS) center, the following error message may be logged in the Internet Information Service (IIS) log on the server:

503 Service Unavailable



CAUSE
This issue can occur because Message Queuing has reached its limit. The 503 error message, which means &quot;service unavailable,&quot; prompts the Mobile Information Server Enterprise Edition computer to queue the message in its Message Queuing queues, and to continue to retry sending the message until a 503 error message is not returned by the wireless service provider.



WORKAROUND
To work around this issue, use either of the following methods:
 * Increase the maximum size of the wireless service provider Message Queuing queue default_smsgwoutboundqueue$. This queue is responsible for queuing messages to the SMS center.

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 * Increase the Max Throughput setting on the SMS Center Connector to increase the volume of messages that are sent to the SMS center.

NOTE: The SMS Center Connector service must be stopped and restarted for the new setting to take effect.

Additional query words: SMSC MMIS MIS exch2kp2w

Keywords: kberrmsg kbprb KB288826

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