Meeting Links not compatible with all versions?

In the new teams version the meeting link is much shorter as the old meeting link and only consisting out of numbers eg https://teams.live.com/meet/943066126xxxxxxxxxxxx34. The problem is that some users can not join the new "short" meeting link. It seems that the new short link is not compatible with all teams versions? Is it possible to generate the old type of the "long" meeting link in order to solve the problem..? Thanks