SEHS Apple Computer Tech Memo How to Update Keychain Password
Anytime a SEHS user changes their “Windows” password, the user needs update their Apple Computer Keychain Password on Apple computers managed by SEHS.
When the below prompt appears you need to click CREATE NEW KEYCHAIN.
DO NOT IGNORE THIS MESSAGE IF YOU DO NOT CREATE NEW KEYCHAIN YOU WILL BE RUTHLESSLY PROMPTED BY THE SYSTEM FOR A PASSWORD. YOU WILL NEED TO LOG OUT OR RESTART THE MACHINE IN ORDER TO GET THIS WINDOW AGAIN.
If all else fails.. check this link
https://techraptor.net/content/iron-mac-how-to-get-rid-of-annoying-local-items-keychain-box