In this case, if this were the only object that had that parent distinguished name, the previous parent distinguished name would disappear from the directory. Modifying a legacyExchangeDN attribute correctly, but neglecting to add the previous distinguished name as an x.500 address.

In native mode, changing a legacyExchangeDN attribute using an Active Directory editor, such as ADSI Edit, after moving a mailbox across administrative groups.

Manually modifying a legacyExchangeDN attribute to create a parent distinguished name that did not exist previously.

However, there are valid reasons for changing a legacyExchangeDN attribute. For Cached Exchange Mode users, this action means re-synchronizing their offline store file (.ost file) and re-downloading their offline address book. Terms or concepts that one must clear about Offline Address Books for proper troubleshooting,Ĭhanging a user's legacyExchangeDN attribute is a drastic step that, among other things, requires the re-creation of the user's Outlook profile.

Outlook download offline address book