>If you try search a message from UT's search button with message ID sample like 1153000, after search, a message displays like "you're trying a feature which needs premium membership"
>
>But, if you write message#1153000 into a message and make a preview, after that you can click message... :)

The ability to search on a message ID is partly restricted to PUTM. It is not like the full search which is fully restricted. We did not want to hide that ability from inside a message because this was putting too many boundaries on the help provided by some members to others. However, the ability to search directly is part of the PUTM.