Tricky Upgrade ? 5.5 to 2003 with ZERO downtime ?

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Subject:Tricky Upgrade ? 5.5 to 2003 with ZERO downtime ?
Posted by: CYACOMINI (ILG) (CYACOMINII…@discussions.microsoft.com)
Date:Wed, 26 Apr 2006

Or as close to Zero as possible....

We have 2 sites, both using EXC 5.5 on 1 server. Seperated by about 800miles.

In a position now where i need to consider the impact of upgrading both
sites from 5.5 to 2003. Problem is, our Exchange server also takes care of a
number of other processes which we need to run 24/7 - this is demanded by our
client and written into a contract.

From what i read, to upgrade 5.5 to 2003 you need to build a 'swing server'
- we have no spares.

Can anyone tell me if there is an easier way to achieve this upgrade ? Is it
possible to do an inline upgrade going 5.5 to 2000 to 2003 ?

thanks in advance !!

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