There have been reports of problems with GP10+Outlook in a Citrix environment. The home page on GP 10 crashes. The typical response has been to remove Outlook but there may be another option. Word come from Michael Smith via the GP Newsgroup that the file lcmsg.gif found by default in C:Program FilesMicrosoft DynamicsGPBackgroundImages has a conflict with DirectX and that renaming the file to something else can solve this issue.
You can see the whole thread here: http://groups.google.com/group/microsoft.public.greatplains/browse_thread/thread/e7cb057252aea1a2/f4d05930546115c7?show_docid=f4d05930546115c7