Keeping these differences in mind, we will split

This approach consists of eight steps: 1. Capacity planning 2. Deploying the Live Communications Server Client Microsoft Office Communicator 3. Generating a list of Exchange IM users 4. Gathering and exporting user contact lists 5. Homing users 6. Importing user contact lists and permissions to Live Communications Server 7. Using dual contacts 8. Removing Exchange IM after a transition period Gradual Migration Importing Users Contacts and Permissions This migration path is mostly designed for large organizations with a significant number of IM users. The idea is to migrate users in batches over a period of time (days, weeks, or even longer). The intention is to make the migration seamless for users and enable them to use IM regardless of whether they or their contacts have been migrated. There are many reasons for doing it this way, including deployment of a pilot population, the time involved to install client computers, and the learning curve needed for help desk and support teams as they are trained on the new software. The migration process is more or less identical to that described earlier in the two immediate migration scenarios. Organizations just carry out the process over a longer period of time. Gradual Migration without Importing Users Contacts and Permissions As with the previous example, medium and large organizations with a significant base of Exchange IM users may find that a gradual migration is a more prudent and realistic path. The transition should be, as in the previous example, seamless and with nearly no user interaction. This approach provides two main benefits. One, users won t see dual contact entries, as they would when both Exchange IM and Live Communications Server services are enabled during the transition period. Two, IT administrators can confirm that everyone can log on to Live Communications Server services before actually needing to do so. The concept behind this migration path is similar to the previous one; however, the contact lists are migrated after all users are enabled and migrated to Live Communications Server. After all the users are enabled for Live Communications Server, you need to verify that they can log on, and that their contact lists and permissions have been migrated and the Exchange IM services disabled. In cases where a user s contacts list is not properly migrated, the administrator can migrate it again, because a copy of the user s contact list is stored in the file server that was stored during the export process. 188 Chapter 8

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