Rename Existing Files
How can I rename the documents that are already loaded in SharePoint library using DocKIT?
Take a full inventory of files in a document library using the List Metadata Collator tool available in DocKIT. In the generated metadata file, insert a new column with name New Name and provide the replacement name for each file in the column.
Create a new task using Assign Metadata to the documents in SharePoint Libraries option. Provide the metadata file which you have created as input and execute the task.