Encrypted drive password is requested in all accounts

[mac_in_tosh]

This happens every time I mount my password-protected Time Machine external drive in my (administrator) MacBook Pro account and then eject it when done. When any other account on the machine is entered at a later time, the window requesting the drive's password is displayed and one has to click on Cancel to dismiss it.

Why does this happen?

 

[chabig]

The password is required every time an encrypted disk is mounted, unless you check the box to store it in Keychain. You might need to do this in every account.