At my place of work the email system is lotus notes. The lotus domino server was set up with fairly open access for the longest time. We could use any client we wanted if we knew how to configure it. A while ago they took steps to secure it and closed off POP3 and IMAPI access.
That left us with having to use only Lotus Notes. For Outlook 2003 I was able to use Outlook 2003/2002 Add-in: Notes Connector from Microsoft. When Outlook 2007 was released, Microsoft never updated that addon. IBM also did the exact same thing. The IBM addon is called Domino Access for Microsoft Outlook . After some digging, I was able to get the IBM DAMO connector to work with Outlook 2007.
The first question is where do I find or download the DAMO? The simple answer is that you get it from your server administrator. You cannot download it as an individual component. You have to install a copy of the Lotus Domino server to get the DAMO installer. I have no clue why IBM does not provide it as a standalone download. I also do not see it hosted anyplace else. I am reluctant to host it myself because of that.
So to get your hands on it yourself you will have to download a trial copy of Lotus Domino 8 (or whatever the current trial is) from the Lotus downloads page. This does require registration, but its fairly painless. When you do the install, you can deselect everything except DAMO. I somehow lost the DAMO installer when I tried it, but was able to do a computer search to find it.
Once you do the install, you must add the install location (%ProgramFiles%\DominoForOutlook) to your Path variable in environmental variables. Make sure that all other lotus locations in that path variable are after the one you just added. I did see a registry key to check. Mine was set to the correct value by default.
Change LoadBehavior to 3.
The next issue you will run into is missing emails or messages that don't replicate into outlook. By default, you will only see the last 90 days of messages and will be limited to 200M of email. In the Outlook tools -> options -> Domino Preferences you will find a replication section. Bump it up to 365 days and 1600M. Then close out of Outlook and reopen it. Once it finishes replication, go back in and lower the number of days in those options. If you leave the number at 1 year replication will be slower day to day.
So far it has worked very well. I am still looking into an issue where a message with a corrupt message body does not show up in Outlook but does in Lotus.