Professional Edition Only
Specifies the number of days after a password expires during which users will still be allowed to access encrypted volumes without first selecting a new password. This option is only meaningful when password expirations are enforced. Valid values are from 1 to 999 days.
In the absence of a grace period, volumes with expired passwords will be inaccessible until the passwords are changed.
/GRACE = NNN
/Grace=10
/G=5
/g=30