The Remove All option of the Microsoft Exchange Server version 4.0 Setup
program does not remove all the Microsoft Exchange files and directories.
In particular, the directory structure appears intact and there are files
left in some of the subdirectories.
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This is by design. Setup will delete all files that were installed by Setup
except those that have a different time stamp, indicating that they were
changed. Directory (DS) and Information Store (IS) data files are deleted
so that they won't affect a new installation on the same server. Any other
files that were not originally installed are not deleted. The directory
tree remains intact and Microsoft Exchange settings in the registry are
removed.
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