/usr/share/man/man3/mapiadmin_init.3.gz is in libmapi-dev 1:2.0-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man3/libmapiadmin.h.3.gz
/usr/share/man/man3/libmapiadmin.h.3.gz