Both Digital ALL-IN-1 and Microsoft Exchange Server use single-instance storage for mail messages ¾ one message addressed to multiple recipients on a server is stored once. However, when users' documents are extracted for migration, each user has a personal copy of each document in the migration files. As a result, more disk space may be required for Microsoft Exchange Server than for Digital ALL-IN-1.
There are several strategies for preventing the volume of migrated materials from overloading Microsoft Exchange Server, as shown in the following table.
|Empty wastebaskets on folders in user accounts.||A few days before migration.||Deleted documents aren't migrated.|
|Have users clean up their folders before migration.||A few weeks in advance, with additional reminders as time to migrate gets closer.||Only users delete mail.|
|Limit migration to a recent date range.||During the extraction process.||Old documents, including mail in special folders, aren't migrated.|
|Limit migration to inbox and one special folder.||During the extraction process.||Allows users to put old documents they need in a folder to be migrated. The date range, if used, is applied to both folders.|
|Migrate accounts only; allow users to forward valuable items to their new mailbox.||During the extraction process, and before the old accounts are removed.||Allows users to migrate valuable data, and speeds the migration process for the administrator.|
|Migrate accounts only, without migrating file cabinet contents.||During the extraction process.||Users start afresh with Microsoft Exchange Server.|
In all these strategies, it is important to let users know which documents are being moved.