One obstacle some organizations face when trying to migrate from Microsoft Exchange to a free groupware server has been Outlook users who, for whatever reason, are not yet willing to switch to another client. Bynari, Inc. in collaboration with a number of server developers, including the Citadel project [http://www.citadel.org] has developed a new Outlook connector that uses open standard data formats and protocols to store groupware data. Users of legacy environments (i.e. Windows + Outlook) will now be fully interoperable on the same server with users of free software. This could potentially spell the permanent end of Exchange lock-in.