Hi, I'm trying to read the mailbox users from an unmounted exchange database using ese api. Below is the code snippet, #undef JET_VERSION #define JET_VERSION 0x0501 #include "Esent.h" int _tmain(int argc, _TCHAR* argv[]) { JET_INSTANCE instance; JET_ERR error; JET_SESID sesid; JET_PCSTR szFilename = "E:\\EXCHANGE\\FSG\\Mailbox Database.edb"; JET_DBID dbid; JET_API_PTR value; char szbuff[1024] = {0}; error = JetSetSystemParameter(&instance, JET_sesidNil,JET_paramDatabasePageSize, 4096, NULL); error = JetCreateInstance(&instance,"instance"); error = JetSetSystemParameter(&instance, JET_sesidNil, JET_paramLogFilePath, NULL, "F:\\EXCHANGE\\FSGLOG\\"); error = JetGetSystemParameter(instance, JET_sesidNil, JET_paramDatabasePageSize, &value, szbuff, 1024); cout<<"\nJetGetSystemParameter value = "<<value; error = JetInit(&instance); error = JetBeginSession(instance, &sesid, NULL, NULL); cout<<"\nJetBeginSession identifier = "<<sesid; error = JetAttachDatabase(sesid, szFilename, JET_bitDbReadOnly); cout<<"\nJetAttachDatabase = "<<error; error = JetOpenDatabase(sesid, szFilename, NULL, &dbid, JET_bitDbReadOnly); error = JetCloseDatabase(sesid, dbid, NULL); error = JetDetachDatabase(sesid,szFilename); error = JetEndSession(sesid, sesgrbit); error = JetTerm(instance); return 0; } Here, the api "JetAttachDatabase" always returns error code -1213 JET_errPageSizeMismatch -1213 The database page size does not match the engine. Can anyone explain why i'm getting this errror ? Should I need to change the JET_VERSION ? Thanks, Inmar

Hi Inmar, For development issue, I suggest you to write the post in our development sub forum: http://social.technet.microsoft.com/Forums/en-US/exchangesvrdevelopment/threads Thanks, Elvis

Hi Inmar, For development issue, I suggest you to write the post in our development sub forum: http://social.technet.microsoft.com/Forums/en-US/exchangesvrdevelopment/threads Thanks, Elvis

My guess is that because of the error you are getting you are trying to open an EDB with 4K page sizes with a version of the API which designed for 8K pages, or vice versa. Which version of Exchange created the EDB and which version of Windows are you running?