Topic Last Modified: 2010-02-22

The Microsoft Exchange Server 2010 Management Pack for System Center Operations Manager monitors the Windows Application log on computers running Exchange 2010 and generates this alert when the events specified in the following Details table are logged.

To learn more about this alert, in Operations Manager, do one or more of the following:


Product Name


Product Version

14.0 (Exchange 2010)

Event ID


Event Source


Alert Type


Rule Path

Microsoft Exchange Server/Exchange 2010/Common Components/Hub Transport and Edge Transport/Transport

Rule Name

A non-SMTP Gateway Connection failure has occurred on the specified connector: The Drop Directory Quota limit has been exceeded.


This Error event indicates that the Drop directory that is used by a Foreign connector has exceeded its maximum allowed size.

The maximum size of the Drop directory is specified by using the DropDirectoryQuota parameter on the Set-ForeignConnector cmdlet. By default, the value of the DropDirectoryQuota parameter is unlimited.

Each Foreign connector that is configured on a Hub Transport server uses a specified Drop directory to send messages to a local messaging server that is called a foreign gateway server. A foreign gateway server does not use SMTP as its primary transport mechanism. All outbound messages that are sent to address spaces that are defined by a Foreign connector are put in the specified Drop directory.

User Action

To resolve this error, do one of the following:

  • Remove files from the specified Drop directory until the size of all files in the Drop directory is less than the value that is specified by the DropDirectoryQuota parameter.

  • Increase the value of the DropDirectoryQuota parameter on the Set-ForeignConnector cmdlet. The valid input range is 1 B to 2 GB. You can also remove the maximum allowed size on the specified Drop directory by setting a value of unlimited.

For more information, see Configure the Drop Directory.

For More Information

If you are not already doing so, consider running the Exchange tools created to help you analyze and troubleshoot your Exchange environment. These tools can help make sure that your configuration aligns with Microsoft best practices. They can also help you identify and resolve performance issues, improve mail flow, and better manage disaster recovery scenarios. To run these tools, go to the Toolbox node of the Exchange Management Console. To learn more about these tools, see Managing Tools in the Toolbox.