http://seer.entsupport.symantec.com/docs/273149.htm
How to turn off archiving for a sub folder within the inbox using Enterprise Vault Policy Manager (EVPM)
Details:
If you run a customized EVPM script to apply different archiving settings to the Inbox (example only as this will apply to any folder with subfolders in a mailbox), those settings will be inherited by any subfolders of the Inbox. If you wish to exclude the subfolders from having the same policy as the Inbox, modify the EVPM script below to match the particular DirectoryComputerName, SiteName, user's distinguished name and also each individual subfolder that you wish to exclude. Edit the file in Notepad and save in UNICODE format, with an .ini extension.
[Directory]
DirectoryComputerName = directorycompname
SiteName = Vault Site
[Mailbox]
DistinguishedName = /o=VAULTXLAB/ou=First Administrative Group/cn=Recipients/cn=vaultadmin
LDAPquery = /o=VAULTXLAB/ou=First Administrative
Group/cn=Recipients/cn=vaultadmin
(This section allows the user to distinguish which mailbox this script will run under. ALL will run all mailboxes on the Exchange server. This can also be performed by using the distinguished name,
or un-rem the LDAPquery section and go by any type of LDAP query.)
[Folder]
Name = (specify the subfolder name such as \Inbox\personal)
Filtername = DoNotArchive
OverrideArchiveLocks = True
Note: Wildcards in EVPM (such as \inbox\*) are not recognized so the folder name needs to be specified, as EV needs to know the folder structure.
1. Copy the file to the \Program Files\EnterpriseVault folder.
2. From the command line, change to the directory to \Program Files\EnterpriseVault
3. Type evpm
4. Type the Exchange Server name and press Enter
5. Type the Service Mailbox Alias and press Enter
6. Type the .ini file name and location and press Enter. If the .ini file is in the EV directory, just type in the filename.
Note: To confirm that the policy for the folder has taken effect, right-click the folder within Outlook and select Properties. Select the EV tab. The Settings section should now read:
This folder is now set to 'Do not Archive'. Additionally if the folder that is not to be archived is not a subfolder and not directly under the inbox, the following syntax should be used in the script, Name = \testing. (Testing is an example of a folder name)
Note: For some special folders created by Outlook you do not need to specify a path, you specify only the folder name without the leading backslash. These special folders are: Inbox, Outbox, SentItems, DeletedItems, Drafts, Calendar, Contacts, Journal, Notes, Tasks. These names work for all languages so, for example, you can specify 'Inbox' on a Japanese system.
Examples:
To specify a folder called 'xyz', in the root folder:
Name = \xyz
To specify the 'Deleted Items' folder:
Name = DeletedItems