Determine Microsoft Exchange CD Key from the Windows Registry
Have you ever come across an Exchange server that needed to have Exchange re-installed, but you couldn't find the original CD key for the installation? You can look into the Windows Registry and determine the key. Here is the location:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft Integration\*CRAZY HASH*\
Where *CRAZY HASH* is some random string of characters and dashes like 12A456B8-12AB-1234-ABDC-BC321CD123DA12
Inside that key you'll have a string with the name PID3.0 whose value is the CD key!
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