ERROR: [2441-125-3-00000000] Unable to open database
14:06:30.324(09b0:069c) Unable to get database connection information.
14:06:30.324(09b0:069c) RegQueryValueEx(HKLM\Software\Quest Software\Quest Notes Migrator for Exchange\LogLevel):
Upgrading from Notes Migrator for Exchange 4.3.x to 4.5 may produce this error if the credentials being used on the migration console are not sufficient to allow the database to be updated. The database may have problems preventing it from being updated.
Ensure that the account being used to run Notes Migrator for Exchange has the rights in SQL to perform the database update.
Consider starting a fresh database, see the solution below for more information on this.