Search Engine Friendly Archive 
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Forum Archive Enabled (yes/no)

The Search-Friendly Archive works only under the Apache web server with PHP compiled as a module.

It provides a basic structure that search engines can spider to grab all the content on your site.

Display Simple View of Threads (yes/no)

By default, threads in the Archive are displayed in a simple manner. Set this to no to have the real threads linked from the archive.

Forum Archive Threads Per Page (default: 250)

The number of threads to display per page in the threads listing.
This is done on a per-forum basis.

Forum Archive Posts Per Page (default: 250)

The number of posts to display per page in the thread listing.
Note:
On your own forum you can find the Archive here: http://www.yourforum.com/forumdir/archive/
(live example: http://www.vBulletin.com/forum/archive/)
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