Message channel agent user identifier (MCAUSER)

This attribute is the user identifier (a string) to be used by the MCA for authorization to access IBM MQ resources.

Note: An alternative way of providing a user ID for a channel to run under is to use channel authentication records. With channel authentication records, different connections can use the same channel while using different credentials. If both MCAUSER on the channel is set and channel authentication records are used to apply to the same channel, the channel authentication records take precedence. The MCAUSER on the channel definition is only used if the channel authentication record uses USERSRC(CHANNEL).

This authorization includes (if PUT authority is DEF) putting the message to the destination queue for receiver or requester channels.

On IBM MQ for Windows, the user identifier can be domain-qualified by using the format, user@domain, where the domain must be either the Windows systems domain of the local system, or a trusted domain.

If this attribute is blank, the MCA uses its default user identifier. For more information, see DEFINE CHANNEL.

This attribute is valid for channel types of:

• Receiver
• Requester
• Server connection
• Cluster receiver