I cannot see "Mark as Answer" icon button at right of message

Hi Needo.

An answer can be marked by the original question asker, as well as anyone with Moderator or Answerer rights (which consists of our internal team and MVPs). If you don’t fit one of those categories then the button won’t appear. In order to give credit to the person who answered your question (which is a great thing to do & the best way to thank them ), please go to your original question and mark their answer by clicking on the button.

Regards,