Running Exchange 5.5 SP4. Started getting event IDs 2170, 3128, 2171, 2188, 2175, 2173, and 2143. All pointing to corrupt files in the mtadata folder. Microsoft KB says to stop the MTA service, rename the offending files, run MTA twice, then start the service back up. However, in my quest for information, I came across a web-page that said that the core database files were: Db000001.dat through Db000009.dat Db00000a.dat through Db00000f.dat Db000010.dat through Db000019.dat Db00001a.dat through Db00001f.dat Db000020.dat through Db000026.dat One of the files that appear to be corrupt would be Db00002E, which is listed as one of the core file. The website said this file would have to be copied from the bootenv folder. The Microsoft KB article didn't mention anything about this. Any insights? Paul Maglinger, A+, CA, CCA, CET, MCSE Systems Administrator Shoe Carnival Inc. (812)867-4674 pmaglinger@xxxxxxxx