Hi,
Reading this line from the documentation for SnapCenter for modifying schedule for Windows Plug-in:
"You can modify the schedule type (frequency) only after you detach a policy." Therefore, if you want to modify the schedule type of the only policy attached to a resource, you must perform the following:
1) Attach a second placeholder policy.
2) Detach the original policy from every resource and resource group that uses that policy.
3) Modify the schedule type.
4) Attach the modified policy again to all the resources and resource groups.
5) Detach the placeholder policy.
Steps
a) Open SnapCenter, In the left navigation pane, click Settings.
b) In the Settings page, click Policies.
c) Select the policy, and then click Modify.
d) Modify the information, and then click Finish.
Covered in section - Protecting Microsoft Windows file systems > Managing policies > 'Modifying policies'
http://docs.netapp.com/ocsc-42/index.jsp?topic=%2Fcom.netapp.doc.ocsc-dpg-vm%2FGUID-72C18AB8-336B-400A-A8DB-51DB4B952A2B.html
Give it a try.
Thanks!