There are some situations where we recommend to go ahead and mark the correct answer for a user. You should always be sure that a reply is in fact the correct answer to the question. If that is not given, you can still "bump" the user by adding a comment, asking if a reply has answered the question. Should that not happen, you can still decide to mark a reply as the valid answer.
Converting questions to a discussion
Maybe there is not a single, valid answer to a question? Sometimes people start a topic as question, but it actually is a discussion topic. In that case you can convert a question into a discussion topic. You can find the option in the top right corner in the topic view (in the Control environment):
I cannot mark a valid answer, why?
Often users post a question, but choose the topic type "discussion". In this case you need to convert the discussion to a question first. Use the same option as described above. After that, a reply can be marked as the answer.
Note: Only one answer can be marked as the valid solution. If there is a second, different question within a topic, then maybe it is better to move that question and create a new topic with it. This way your users will have it easier to find the right information.
