These specific input features require attention. This often occurs when features are positioned outside the current Output XY Domain environment. The Output XY Domain environment sets the allowable coordinate range for x,y coordinates. If a feature falls outside this range, it cannot be added to the output. In addition, with some tools, such as Append, that have a target dataset, if the features of the input fall outside the Output XY Domain of the target, they also will not be added. Similarly, the Output M Domain and Output Z Domain environments limit the coordinate range for m- and z-coordinates.
Review the Output XY Domain, Output M Domain, and Output Z Domain environments, and reset them to Same as Input if they are too restrictive for your inputs. When using a tool such as Append, check the coordinate system of the target dataset, and if unknown, define a coordinate system for the feature class. Also, consider creating a feature class with a broader x,y domain if the current x,y domain is too restrictive.