I have a shapefile of point locations that I edited after the original file was created, however the the attribute table was not updated with the new coordinates. So I am trying to figure out how to update the attribute table with the new point location coordinates. I am using ArcGIS Desktop 10.6.1.
Open the attribute table.
Right click the X column header and select "Calculate Geometry".
In the dialogue that appears, select "X Coordinate of Point" at the top.
Check the units are OK.
Repeat for the Y field.
Alternatively, use the 'Add Geometry Attributes' tool, and select "POINT_X_Y_Z_M". This will add POINT_X and POINT_Y fields if they don't already exist and will populate them with the coordinates (and Z/M fields if appropriate).