Available with Standard or Advanced license.
You can fix errors either through the Error Inspector or by clicking them on the map with the Fix Topology Error tool.
- Open the Error Inspector and search for errors, or click the Fix Topology Error tool  on the Topology toolbar. on the Topology toolbar.
- Click the error in the Error Inspector list or use the Fix Topology Error tool to click it on the map. 
The error is drawn in black on the map. 
- Right-click the error in the list or on the map and click one of the available fixes. The fixes listed depend on the type of error. 
For example, to fix a Must Not Overlap error by merging an overlapping polygon into another polygon, right-click the error, click Merge, then choose the feature into which to merge the error feature. 
- Validate the topology again to ensure the edit was correct.