Navigate to Infrastructure Operations > Configurations > Inventory Management
Clear any previously applied filters
Expand Adapter Instances and click on the appropriate adapter category
Example: For a vCenter adapter, click the vCenter Server selection
Click on the adapter that is stuck in the Stopping state to highlight it
Click the Stop Collecting button (square icon) in the tool bar and wait for the Collection State to change to Not Collecting
Tip: Hover the cursor over the icon in the Collection State column to see the current state
Click the adapter instance to select it and click the Start Collecting button (triangle icon) in the tool bar
Verify the Collection State changes to Collecting
Tip: It may be necessary to click the Refresh button (circle arrow icon) in the top right corner of the window to update current status.