/usr/lib/opendbx/libmssqlbackend.so is in libopendbx1-mssql 1.4.6-5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/opendbx/libmssqlbackend.so.1.2.0
/usr/lib/opendbx/libmssqlbackend.so.1.2.0