Import the OWA-Schema.ldf File
LDAP Data Interchange Format (LDIF) is a standard defined by the IETF LDAPEXT working group. For more information about this standard, see http://www.ietf.org/html.charters/ldapext-charter.html. Windows 2000 and Windows XP include a command-line tool, LDIFDE, to import directory objects using LDIF files and export directory objects as LDIF files.
To segment Outlook Web Access on a per-user basis, you must add the msExchMailboxFolderSet attribute to Active Directory. Exchange 2000 Server Service Pack 2 (SP2) comes with the LDIF file OWA-Schema.ldf. Use the LDIFDE tool to import this LDIF file, which adds the attribute to the schema and extends the Mail-Recipient class.
Important Make sure that the person updating the schema in your organization is a member of the Schema Admins group.
To import OWA-Schema.ldf
Note Because LDIFDE writes log files, run this command from a directory with read/write properties.