Hi I am new for exchange server. We install windows 2003 exchange server in the member server in a child domain with windows 2003 Active Directory (Install exchange server in the DC is no problem). After install, mailbox store is dismount. do mount, get following error: "An internal processing error has occurred. Try restarting the Exchange system manager or the microsoft exchange information store service, or both, ID no: c1041724". I search error in the internet, and try use eseutil /p and get following error message: "Operation terminated with error - 1811 (JET_errFileNotFound, File not found) after x.x second." I check c:\Program Files\Exchsrvr\MDBDATA, no more priv1.edb and priv1.stm inside, pub1.edb and pub1.stm is here (Public Folder store is mounted in the Exchange system mangere). I try to creat other new Mailbox store in the First Storege Group, get same error and no .edb and .stm files in the directory with new name too. My question is: 1) How to recreat priv1.edb and priv1.stm again without remove and install again exchange server ( Or what is reason to missing that two files or cannot mount to recreat that two files)? 2) Where can find documents for Exchange 2003 server install guide for the member server in the child domain of the Active Directory? Thanks ben