Preemptive archiving in advance

Description

The Outlook Add-In copies items from the user's Outlook .OST file to the Vault Cache before the items are due to be archived. The process is known as preemptive caching. Preemptive caching takes place on the user's computer. It reduces the number of items that need to be downloaded from the mailbox archive to the Vault Cache when the two are synchronized.

Preemptive caching obeys the settings in the Exchange mailbox policy's archiving rules.

The Outlook Add-In uses the Preemptive archiving in advance value when it determines the age of items on which to perform preemptive caching. To determine the age, it deducts the Preemptive archiving in advance value from the Archive items when they are older than value in the Exchange mailbox policy's archiving rules.

For example, you do not change Preemptive archiving in advance from its default value. You set the Archive items when they are older than mailbox policy setting to six weeks. The Outlook Add-In deducts the Preemptive archiving in advance default value of seven days from six weeks, and preemptively caches the items that are five weeks old or older.

Note that if you use an archiving strategy that includes quotas, it is difficult to predict the age at which items are archived. It is then usually advantageous to preemptively cache items as soon as possible. Enterprise Vault therefore uses 0 days as the age at which to perform preemptive caching if both of the following are true:

  • The mailbox policy uses an archiving strategy that is based on quota or age and quota.

  • You do not change the Preemptive archiving in advance setting from its default value.

Supported values

  • An integer, specifying a number of days. The default is 7.

Legacy name

OVPreemptAdvance