The columns in CSV files are separated with a comma. That's no surprise.
In most european countries comma is used as decimal separator and therefore Microsoft Excel is expecting a semicolon as csv separator.
Unlike Libre Office, Microsoft Excel is not asking or detecting the separator, so it's quite complicated for end users to import comma-separated CSV files in european localized Excel versions.
I would love to have an option (radio buttons) on the CSV report generation form to specify, if
; should be used as separator.