Troubleshooter--Moving the MTA Queue

Using the Net Stop msexchange mta command or the Microsoft Management Console (MMC) Computer Management snap-in, stop the MTA service.

Make a backup copy of the existing MTA data (probably program files exchsrvrmtadata).

Use a registry editor to look at the HKEY_LOCAL_MACHINESYSTEM CurrentControlSetServicesMSExchangeMTAParametersMTA Database Path registry subkey, which is your MTA database's current location. The corresponding value for the MTA processing directory is Parameters MTA Run Directory; if you want to move the Run directory, you can move it at the same time you move the databases.

On the new target path, recreate the same directory structure—including permissions—as the original.

Copy all the *.dat files from the original directory to the new one. If you're also moving the Run directory, move the remaining files to the new MTA Run directory.

Edit the HKEY_LOCAL_MACH-INESYSTEMCurrentControlSetServicesMSExchangeMTAParameters MTA Database Path and HKEY_ LOCAL_MACHINESYSTEMCurrentControlSetServicesMSExchange MTAParametersMTA Run Directory registry subkeys to make them point to the new paths.

Delete the old Mtadata directory, then run program filesexchsrvrbin mtacheck. If Mtacheck reports no errors, you're good to go; otherwise, fix any errors it reports.

Use the Net Start msexchange-mta command to restart the MTA.