When you move a topic to another sub-forum you'll see an locked icon in the sub-forum where the topic has been found for the first time.
you can set that when you move a topic, you can choose to leave a link to the new place of the topic.
I know that but when you leave a link in the sub-forum you see the locked icon
![[Image: lockfolder.gif]](https://camo.mybb.com/3229c504cba9041cb1d1876b462d4914c16a557a/687474703a2f2f7777772e6d7962626f6172642e636f6d2f636f6d6d756e6974792f696d616765732f6c6f636b666f6c6465722e676966)
.
It's designed so it actually does show a locked icon.