This video shows the first two steps that should be taken in order to prevent and resolve keychain pop-up issues on a university-issued Mac computer.
The first portion of the video shows what steps to take when logging into the Mac for the first time while on campus since resetting the NetID password. Here, proper steps to update the keychain are shown, which are vital to preventing keychain issues.
The second portion of the video shows steps to take if the "Update Keychain" pop-up has already passed and not updated correctly. This is another way to updating the stored keychain password to match the most current password for the account.