Event ID - 9156

Event Id9156
SourceMSExchangeMTA
DescriptionA resource limit has been reached while attempting to open an association. There are no free control blocks available for network type <type>. The configured count is <number>. [<value> <value> <value> <value>] (10)
Event InformationExplanation :
The number of control blocks (CB) available for the message transfer agent (MTA) to transfer mail over multiple X.400 connectors might not be sufficient. This is particularly noticeable in heavy mail traffic, and/or poor network conditions.
Reference Links200259 XCON: Event ID 9156 from the Exchange Server 5.5 Message Transfer Agent

MTA Transfers Mail Slowly or Stops and Event IDs 1294, 2253, 4284, 9156, and 9202 Appear

XCON: Maximum Number of X.400 Connectors That Can Be Installed on One Exchange Server Computer

XCON: 9156 Errors Occur After Applying Exchange 5.5 Service Pack 2

XCON: TCP/IP Control Block Shortage Event ID 9156

XCON: Event ID 9156 from the Exchange Server 5.5 Message Transfer Agent

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