Out of Office Issues

One user is having issues with out of office replies externally. The Exchange environment Exchange 2007. This particular users is using Office 2003 on Windows XP, and is the only users who is using this version of office. This particular company has gone through several IT changes, and because of this their Exchange environment has been through the ringer. I had to change the CAS, OAB, UM, and AutoDiscover internal and external URLs, as well as other Exchange maintenance.

All other users are able to utilize Out of Office, but not this one in particular. I had first thought it to be a compatibility issue between Office 2003 and Exchange 2007. However, I made a test account, on this particular user's computer using Office 2003, and tested Out of Office and it works great internally and externally.

I adjusted Exchange to allow legacy external out of office replies as well checked "Allow Automatic Replies" and "Allow automatic forward". I then directed my attention to his account and utilized MAPI editors to delete all Out of Office rules, but that did not fix my problem. I then on another computer using office 2007 added his account to Outlook and tried out of office and it did not work there as well. I tried using OWA Out of Office feature, and that did not work.

I do not know what could be causing this problem for this one user.  Again, this is only a problem for external out of office replies for this one users.