/usr/share/help/oc/evolution/mail-account-manage-microsoft-exchange-evo-mapi.page is in evolution-common 3.18.5.2-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/help/oc/evolution/../../../help-langpack/oc/evolution/mail-account-manage-microsoft-exchange-evo-mapi.page