Is it possible to remove/change the out of office message for a user in an exchange environment w/o logging in as them. I have administrative privileges.
Use Outlook Web Access and you can turn it off in the options.
PS You can open the users mailbox with https://server/exchange/useralias, where "useralias" is the users Exchange alias. You should be able to open this with the administrator username and password.
Ha, I beat Evan to it this time (by 6 seconds :-)
If you remove the silly "Deny / Receive As" permissions at the "Organization" level you can access their mailbox with your "Administrator" credential using OWA and just turn the feature off.
By default in Exchange 2003, though, members of several groups (Administrators included) can't access any ol' user's mailbox because of these "Deny / Receive As" permissions. I've removed these permissions for years because I think it's perfectly legitimate for an Administrator to access user mailboxes as necessary for troubleshooting, etc.
You should probably be mindful of your corporate privacy / security policies as you go about doing this.