Thanks for contacting Syncfusion forums.
Query: “How can I hide specific columns when exporting grid to excel?”
From your query, we understand that you need to hide the certain column, only while exporting the Grid. We have already discussed this topic in our knowledge base document section. Kindly refer the below link for the knowledge base document
Note: we have removed the columns from the GridProperties in server side using Remove property of c#
Please get back to us if you have further queries.