Upgrading Existing Exchange 2000 Front-end OWA Servers
There are several important factors to keep in mind when upgrading an Exchange 2000 front-end/back-end OWA configuration to Exchange Server 2003. First, before upgrading back-end mailbox servers, all front-end servers in an administrative group must be upgraded to Exchange Server 2003. The upgrade process on the Exchange back-end servers will actually stop if this situation is not corrected in advance. Consequently, it is important to upgrade or replace front-end servers as the first wave of an Exchange Server 2003 migration process.
The Exchange virtual server in Exchange 2000 runs on IIS 5, which cannot communicate with the IIS 6 Exchange virtual server in Exchange Server 2003. So, Exchange ...
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