The easiest way is to put the source server in the trusted servers list. This is the other: http://support.microsoft.com/kb/883260
From: Evan Brastow [mailto:ebras...@automatedemblem.com] Sent: Sunday, December 30, 2012 1:56 PM To: MS-Exchange Admin Issues Subject: WAV files in Outlook Hi all, Happy New Year and thanks to so many people that have helped me for the, gosh I don't know, 13 or 14 years I think I've been on this list. Quick question, maybe? My users are getting tired of the usual warning message they get when they go to open a .wav file from within Outlook 2007 (voicemail, for instance.) Is there a way of getting Outlook to not pop up the "You should only open attachments from a trustworthy source" message box every time they go to open a wav file? Thanks very much! Evan --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com<mailto:listmana...@lyris.sunbeltsoftware.com> with the body: unsubscribe exchangelist --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist