CSV opening in Edge
Step 1: Click on “File”.
Step 2: On the bottom left screen, click “Options”.
Step 3: You will have a pop-up box like the below, click on “Advanced”.
Step 4: Click on dropdown arrow next to “Microsoft Edge” and change it to “Default Browser”.
Step 5: Press OK
These steps will rectify the complication. Please Try closing your browser and outlook if it doesn’t work immediately.