By default, computers requiring agent installations and
uninstallations are added to the Pending Installations list to wait
for approval. You can approve or cancel all pending actions or each
individual pending action.
To cancel all pending installations or
Expand Microsoft Operations Manager (default) in the
Expand Configuration in the left pane.
Click Pending Installations in the left pane.
Click Action on the menu bar.
Click Cancel All Pending Actions on the Action