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The Extended Directory Catalog is a new type of directory catalog available in R5.0.5. For more information on this feature and instructions to set it up, see the Release Note "Extended Directory Catalog" in the "Things you need to know" section of the Release Notes.

Using the Extended Directory Catalog on a server is particularly recommended if using the standard Server Directory Catalog (created from the DIRCAT50.NTF template) is causing Mail Router backups. When the Mail Router uses the standard Server Directory Catalog for mail routing lookups, it uses full-text searching, a slower process than using views, to look up names that don't correspond to the "Sort by" directory catalog configuration selection.

For example, if the "Sort by" field is set to Last Name, then the Router uses full-text searching to look up names that don't begin with the last name, such as John Doe/Acme or JohnDoe@acme.com. Using the "Sort by" configuration option "Distinguished Name" will avoid full-text searches for names in the Notes distinguished name format, such as John Doe/Acme (possibly a majority of names). However, the Distinguished Name sort order will still cause full-text searches for names such as JohnDoe@acme.com, so using Distinguished Name as the sort order may alleviate only some of the performance problem, depending on the types of names the Router needs to process.

If a mail routing backlog develops while using the standard Server Directory Catalog, follow these steps to troubleshoot the problem:

1) To determine if the standard Server Directory Catalog is the cause of the problem, remove its file name from the Server document or from the Public directory profile.

2) If the standard Server Directory Catalog is the cause of the problem and the "Sort by" configuration selection is not Distinguished Name, change the selection to Distinguished Name and then re-enable the Directory Catalog to see if the change resolves the problem.

3) If using Distinguished Name as the "Sort by" selection does not solve the problem, use the Extended Directory Catalog instead, so that the Router uses view lookups rather than full-text searches to look up names.