Export project data using Export to Spreadsheet. Find
Edit the data and import changes to update the project drawings using Import from Spreadsheet. Find
Some of the updates that can be imported into drawings include:
The attributes in the User-Defined Attributes list are also added to the fields exported in the Export to Spreadsheet feature. Add the User Defined Attribute names to the wd_xls_all_template.xlt worksheets to include these fields with the General export option. The default location for the spreadsheet template is C:\Program Files\Autodesk\AutoCAD {version}\Acade\Support\{language code}.