Hi Mike,
As Frank mentioned, it really depends of the information and format you need.
What type of data do you want to include in the CSV file?
If you need basic information, such as the Model Name, IP Address, MAC Address, Serial Number, etc., then the Locator Search allows you to export the results table information to a CSV file by clicking the export icon (). But, this will only allow you to export the information that is displayed in the Locator result table.
You may need to add custom columns to the Locator Search Results Table to include device attributes, such as community name, that is not included in the search results out of the box. See TEC1614763 (https://support.ca.com/us/knowledge-base-articles.TEC1614763.html) as an example of how to add a custom column to the Locator Search.
If ArcSight supports data imports from an XML file, you may also want to look at the Modeling Gateway Toolkit (https://docops.ca.com/ca-spectrum/10-2-1/en/customizing/modeling-gateway-toolkit). Modeling Gateway allows you to export all your device models to an XML formatted file.
Thank you,
Brad