In playfab forum, There is no way to find out when someone has replied to your comment, posted an answer to your question and things like that.
The only way is
- To check the the email which is difficult to check everytime from user's perspective
- Go to that particular question/answer to see if anyone has replied back
The idea here is that the playfab forum should have a notification section/panel which shows notifications on following cases :
- Someone upvotes your answer/question
- Someone posts an answer to your question
- Everytime a badge and reputation points are rewarded
- Someone posts comments on your question/answer/ Replies to your comments
So it will be easy to check things out rather than checking email or going to each post to check if anyone has replied back.