yep -- there is a "%"... I created another published Outlook without the "%", assigned the .msg redirection to that published app, did an app refresh and then tried to open a .msg but it returned the same error. The published app runs: "C:\Program Files\Microsoft Office\OFFICE11\OUTLOOK.EXE" "%*" ----- Original Message ----- From: Joe Shonk To: thin@xxxxxxxxxxxxx Sent: Wednesday, October 17, 2007 1:43 PM Subject: [THIN] Re: Outlook 2003 .msg Files What line are you using to publish the app? Are you putting a "%*" after c:\program files\office11\outlook.exe? From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of JAlexander Sent: Wednesday, October 17, 2007 10:38 AM To: thin@xxxxxxxxxxxxx Subject: [THIN] Outlook 2003 .msg Files Hi all. I'm running PS4.5 Platinum on Windows 2003 server and using PNAgent with Content Redirection. Outlook 2003 is a published app and the content redirection is set to open .msg files with Outlook 2003. When a user (or an admin for that matter) attempts to open a .msg file, Outlook appears to open and then pops up with "Cannot start Microsoft Office Outlook. The command line argument is not valid. Verify the switch you are using." When Outlook is already running, attempts to open the .msg file returns "The command line argument is not valid. Verify the switch you are using." I have searched high and low and the only documentation I find on this error is from 2004 in reference to Metaframe XP. The end result was to apply a Citrix service pack. There is a reg key referenced in that article re: the mailto setting but that setting is correctly set to open Outlook. I tried a another published version of Outlook without any switches but I get the same message. Has anyone else experienced this? Thanks for any input.