jaikumar1There is another way you can do it. Some other customers have done it this way.
- Create some custom coding on Forum Topic Page (the thread page) which will hide all the CTA buttons (including kudo, reply, accept as solution etc) for old posts (eg. a year old). Also display some information on top of the Forum Topic Page to say something like "This thread is now archived and closed to new comments. Some of the links provided in this thread may no longer be available or relevant. If you have a question please post a new topic."
The benefit of this way is that people can still see this post via search, and there is no need to maintain the old posts which free up a lot of time of Community Manager.