Man pages matching name exch in section 1:

exch.1.en	debian 13 / util-linux-extra
exch.1.de	debian 13 / util-linux-locales
exch.1.sr	debian 13 / util-linux-locales
exch.1.ro	debian 13 / util-linux-locales
exch.1.ko	debian 13 / util-linux-locales
exch.1.pl	debian 13 / util-linux-locales
exch.1.uk	debian 13 / util-linux-locales