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User IDs

If the WebSphere MQ client is on Windows and the WebSphere MQ server is also on Windows and has access to the domain on which the client user ID is defined, WebSphere MQ supports user IDs of up to 20 characters.

A WebSphere MQ for Windows server does not support the connection of a Windows client if the client is running under a user ID that contains the @ character, for example,

abc@d. The return code to the MQCONN call at the client is MQRC_NOT_AUTHORIZED.

On all other platforms and configurations, the maximum length for user IDs is 12 characters.

 

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