The Archives container in the Administration Console lists archives by type, such as File System, Journal, Mailbox, and so on. When the number of archives of a particular type reaches a threshold number, the Administration Console automatically splits the listing of that type into sub-containers.
For example, if the threshold is set to the default (5,000), and there are 16,000 mailbox archives, the Administration Console uses four sub-containers to list mailbox archives.
To change the threshold
On the Directory Service computer, start the registry editor.
Create a DWORD value called ArchiveListChunkThreshold under the following key:
HKEY_LOCAL_MACHINE \SOFTWARE \KVS \Enterprise Vault \Directory \DirectoryService
Give ArchiveListChunkThreshold a value that is the maximum number of items you want to appear in any of the containers.