If you allow all messages to remain indefinitely on a server with a large number of newsgroups or messages, performance rapidly deteriorates, users have difficulty finding messages, and you eventually run out of storage space. To overcome these potential problems, define expiration policies that determine how long a message resides on the server before it expires and is removed. Create a single policy to control all newsgroups or create multiple policies to expire only specific newsgroups.
To create an expiration policy, open the IIS console and then open the NNTP virtual server to which you want to apply the policies. Right-click the Expiration Policies node and choose New O Expiration Policy to start the New NNTP Expiration Policy Wizard. Within the wizard, specify the following information:
♦ Expiration Policy Name. This is the friendly name for the policy as it appears in the IIS console.
♦ Affected Newsgroups. You can apply the policy to all newsgroups on the virtual server or only to selected newsgroups on the server. If you choose to apply the policy selectively, the wizard displays a dialog box to add newsgroups to the policy. Add the applicable newsgroup names one at a time. Use a wildcard to specify all newsgroups within a specific category, such as support.* or alt.*.
♦ Expiration period. Specify the number of hours that messages can remain in a newsgroup covered by this policy. The default is 168 hours (7 days).
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