Can I see which member of my team made or changed a particular booking?

Yes, a booking made through your portal is normally stamped with the staff login that created it, and later actions such as a cancellation or an amendment are recorded against whoever carried them out, with the date and time. You will usually find this on the booking itself, in a history or activity section, rather than in the main sales reports, so it is there when you need to settle a question about who did what.

How much detail that history holds varies. The fact that a booking was cancelled and by whom is almost always kept. Whether you can see the exact values before and after a change, such as an old date next to the new one, depends on how your portal records amendments. Bookings that come in from the public side of your website will show as customer bookings rather than staff ones, because nobody in your office touched them.

One thing worth being firm about is shared logins. If several people sit at the same desk and use one account, the history will only ever name that account, and the trail stops being useful the moment you actually need it. Giving every member of staff their own login costs you nothing in effort after the first setup and is the single thing that makes this record worth having.

Open a recent booking in your admin area and look for the history or activity tab, and if you find staff names missing there, check whether anyone is still sharing a login before you go further.