Is it Possible in Exchange 2007 to set a Junk E-mail Policy for deletion?

Yes, this may a little different in Exchange 2007, but here is how it is done in Exchange 2003:

Go tot he system manager and then go to your recipient policies.

Add a new policy and click the Mailbox Manager Settings (poilicy) tab.

Add the folder (probably Junk E-Mail) and set the age limit (days). Just type in 45 and it will delete messages in that folder that are older than 45 days.

I'm assuming that this would work in 2007 (I'm using 2003), but if you right click on the Junk E-mail Folder and click Properties.  Then go to the Auto Archive Tab.  There you can change the settings from the default and it will just apply to that junk email folder.  Click on "Archive folder using these settings"  Pick your time frame (45 days) then click "Permanently delete old items."

559624, I want a non-manual way of doing it server-side preferably.

entcee- thats how you do it in 2003, but I think it may be a little different in 2007.

In Exchange 2007 you will configure the policy here:

In the console, the Managed Folder Mailbox Policies tab of the Mailbox node under the Organization Configuration work center.

Let me know if you need help beyond that.

More info:
http://technet.microsoft.com/en-us/library/aa996359.aspx

I created the Mailbox Policy, but I don't see where you set the age of deletion, etc. Am I missing a step?

In addition, I would like for this policy to apply to everyone, so I don't have to do it one-by-one (As I see you can add the policy per user)

Thank You Entcee!