We are implimenting a disaster recovery solution for our Exchange server. The question keeps crossing our minds that since exchange cached mode is used, each person's computer has a backup of their mailboxin the OST file. Can this OSTbe used to re-populate a backup exchange server? Two scenarios: 1. The backup exchange server has empty mailboxes on it 2. The backup exchange server has 24 - 48 hour old data on it.

Hi, That is only doable for small numbers of users. See this about ost encryption keys: http://support.microsoft.com/kb/282496 Leif

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