Exchange Admin

From Technet

Insert the Exchange Server 5.5 CD into the remote machine. Enter the following at the 'Run' command:
X:\SETUP\\SETUP.EXE
Select 'Complete\Custom' install, and deselect all but 'Microsoft Exchange Administrator'.

1) Save all work and close all open applications.
2) Insert the Microsoft Exchange Server CD into the CD-ROM drive.
3) Open the 'Run' command.
4) Type the following and press ENTER:
X:\SETUP\\SETUP.EXE
(where X is the letter of the CD-ROM drive, and is the type of processor the computer has).
5) When the first 'Microsoft Exchange Server Setup' dialog box appears, click 'OK' to proceed. (Setup searches for installed components.)
6) (Optional) To change the default directory for installation, click 'Change Directory...', (A 'Change Directory' dialog box appears) and do one of the following:
a) Enter the path to the desired drive and directory where Exchange Administrator should install.
NOTE: If a dialog box appears indicating that the directory you entered does not yet exist and asking if it should be created, click 'Yes'.
b) Select the desired drive from the 'Drives' drop-down list box and select the desired directory from the directory list box.
7) Click 'Complete/Custom'. (A 'Microsoft Exchange Server Setup-Complete/Custom' dialog box appears.)
8) Clear all of the installation options except for Microsoft Exchange Administrator.
9) Click 'Continue'.
10) (Special Case) If a dialog box appears, requesting the CD key, type the CD-Key found on the CD-ROM jewel case into the text box and click 'OK'. (A dialog box appears, displaying the registration number.)
11) Click 'OK'. (The files are copied and a dialog box appears, indicating that the files have been installed successfully.)
12) Click 'OK'.

Same as the other answer,(install from the back office/exchange server disk) but I wanted to share with you the weird thing I found(and this may just be for me), I installed the exchange admin because I am in the same situation, I found that the permissions tab is missing from the exchange admin. tool. I looked on all the nt4 installs and they have it, but mine doesn't, everything else works fine.

In anwer to the previous statement about permisions...in Exchange admin on the client click on tools - options - permisions..Then check the box that says "Show permisions page for all objects" Thatll sort out the permisions tab problem...

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