Send connector %1: the connection to %2 was disconnected by the remote server.

This Warning event indicates that the specified Send connector was disconnected from the specified remote server. The disconnection was initiated by the remote server.

The disconnected session could be caused by a remote server problem or because an inbound connection limit has been reached on the remote server.

If the remote server has the Microsoft Exchange Server 2007 Hub Transport server role or Edge Transport server role installed, the disconnection could be caused when any of the following inbound connection limits are reached on the remote Receive connector:

• ConnectionTimeOut

• ConnectionInactivityTimeOut

• MaxInboundConnection

• MaxInboundConnectionPercentagePerSource

• MaxInboundConnectionPerSource

• MaxProtocolErrors

For more information, see Set-ReceiveConnector.

To resolve this warning, do one or more of the following:

• Verify the availability of the remote server. For example, use the Ping or PathPing command-line tools to test basic connectivity. Use Ping to isolate network hardware problems and incompatible configurations. Use PathPing to detect packet loss over multiple-hop trips. For more information, see Microsoft Knowledge Base article 325487, How to troubleshoot network connectivity problems.

• Adjust the inbound connection limits on the remote server.

If you are not already doing so, consider running the tools that Microsoft Exchange offers to help administrators analyze and troubleshoot their Exchange environment. These tools can help you make sure that your configuration is in line with Microsoft best practices. They can also help you identify and resolve performance issues, improve mail flow, and better manage disaster recovery scenarios. Go to the Toolbox node of the Exchange Management Console to run these tools now. For more information about these tools, see Toolbox in the Exchange Server 2007 Help.