Use the Polling Schedule tab of the Microsoft System Center Configuration Manager 2007 Active Directory User Discovery Properties dialog box to specify when the selected Active Directory containers are polled to determine whether new users have been added.
The Polling Schedule tab contains the following elements:
- Polling Schedule
- Displays the scheduled discovery poll. By default, polling
occurs once every 24 hours. To customize a discovery schedule,
click the Schedule button.
ImportantApplies only to Configuration Manager 2007 R3. If you configure Configuration Manager 2007 R3 Delta Discovery, do not configure the full discovery polling schedule to be less than the default value of once every 24 hours. 
NoteConfiguration Manager polls the closest Active Directory resource to discover users in the containers specified on the General tab. Because this process can cause significant network traffic, you should plan accordingly.
- Enable delta discovery
-
Specifies that you want to use Configuration Manager 2007 R3 Delta Discovery, which lets you improve the performance of resource discovery by periodically scanning Active Directory for only new or changed resources.Note
Applies only to Configuration Manager 2007 R3.
- Delta discovery interval (minutes)
-
Specifies the interval in minutes at which Delta Discovery runs. The default value is every 5 minutes.Note
Applies only to Configuration Manager 2007 R3.
- Run discovery as soon as possible
- Specifies that this Active Directory discovery poll should
start as soon as possible.
Note
This option is only available after Active Directory containers have been specified on the General tab. This check box is cleared after the discovery request has been sent to the site server.
- OK
- Saves any changes and exits the dialog box.
- Cancel
- Exits the dialog box without saving any changes.
- Apply
- Saves any changes and remains in the dialog box.
- Help
- Opens the Help topic for this tab of the dialog box.