You are configuring the Microsoft Active Directory Import rules, but you are not able to find the Active Directory Synchronization schedule at the bottom of the page as in previous versions before SMP 8.0.
SMP 8.0 HF1 and later
The IT Management Suite 8.0 HF1 release introduced a number of enhancements/improvements of the Microsoft Active Directory Import page.
The following areas were changed:
Filtering and sorting controls
List of import rules
Import rule caption
Active Directory Synchronization Schedule
The Directory Synchronization Schedule settings are now located by clicking the grayed out calendar icon at the top left of the icon bar.
Note: The Directory Synchronization Schedule settings will be grayed out (disabled) by default until you click on the grayed out calendar icon at the top to enable the settings. This also applies to the Resource Import rules.