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Microsoft KB Archive/148284

From BetaArchive Wiki
Knowledge Base

XCON: When and How to Use the Mtacheck Utility

Article ID: 148284

Article Last Modified on 10/28/2006


  • Microsoft Exchange Server 5.5 Standard Edition
  • Microsoft Exchange Server 4.0 Standard Edition
  • Microsoft Exchange Server 5.0 Standard Edition

This article was previously published under Q148284


The Message Transfer Agent check utility (Mtacheck) is designed to provide a soft recovery of a corrupted MTA database. It is automatically installed when Microsoft Exchange Server is installed and can be found in the %Exchange_Root%\Bin directory. This utility should be used when the MTA service will not start due to corruption or suspected corruption in the MTA database.


Mtacheck must be run from a DOS VDM on the Microsoft Exchange Server. It is very simple to use and only has 2 parameter, /v and /f. The parameters and the results of their use are as follows:

Mtacheck.                  minimum logging.
Mtacheck /v                verbose logging.
Mtacheck /f <filename>     minimum logging that is saved to a text file.
Mtacheck /v /f <filename>  verbose logging that is saved to a text file.

For more information about the Mtacheck utility, please see pages 614-617 of the Microsoft Exchange Administrator's Guide and the following article in the Microsoft Knowledge Base:

149017 XCON: MTACheck Event IDs and Command Line Syntax

In Microsoft Exchange version 4.0 Service Pack 4 and Microsoft Exchange version 5.0, two switches were added to Mtacheck.

Mtacheck /rd            removes directory replication messages.
Mtacheck /rp            removes public folder replication messages.

In Microsoft Exchange version 5.0, another switch was added:

Mtacheck /RL            removes unwanted Link Monitor messages

Additional query words: 4.00 corrupt mtadata db dat

Keywords: kbusage KB148284