slackbuilds/office/evolution-ews/README

Evolution EWS is an open source and freely distributed software project
that contains an extension for the Evolution email, calendar and
groupware client that adds support for Exchange Web Service (EWS). This
plugin allows users of the Evolution application to add Exchange email
addresses.

For Microsoft Exchange 2007, 2010 and newer it is recommended to use
the package evolution-ews.

Below variables can be used to configure the build:
  GCOV=ON    : Enable build with GCOV code coverage
  TESTING=ON : Build the testing tree