All, Recently I e-mailed the list requesting pseudo-instructions on a sucessful Standard ==> Enterprise upgrade. The response I received was rather dismal. I have now sucessfully completed this upgrade, and have a set of instructions I have pieced together. Please keep in mind this set of instructions is not complete by far, but a great start. Old Setup: ========== Windows 2000 Server, Service Pack 2 Norton AntiVirus (2.5) Exchange 2000 Standard (installed from BackOffice 2000 suite), Service Pack 2 ----------------- If you installed Standard from the BackOffice 2000 CD, and wish to now upgrade to Enterprise, please read the Microsoft Knowledge Base article Q312426. There is a version problem that you must edit certain aspects of the registry to fix. http://support.microsoft.com/search/preview.aspx?scid=kb;en-us;Q312426 ---------------- Complete system backup. Verify system backup. Run the Exchange 2000 Setup. Select "ReInstall" for the options you wish to upgrade (usually all of the options). After the installation process is complete (you may receive errors, if you do, make sure you either "keep the older file", or "cancel". You may receive active directory error messages (cannot create object, and other similar messages), this is what you press cancel on. The keep the older file messages are because of the service pack. You will need to reboot afterwards. Upon rebooting, DO NOT ATTEMPT TO OPEN OUTLOOK, OR ANY OTHER MAIL CLIENT, you will only scare yourself. When the machine comes back up, install Service Pack 2. Reboot. If the stores do not come up mounted, mount the stores. Done. ------------------ If you do not install SP2, you will receive mounting errors which will make you want to run away and hide from your boss.