Why are the Execs' laptops using POP? That's so 90's. Set the Execs up to use MAPI instead of POP, using RPC over https (Outlook Anywhere). http://office.microsoft.com/en-us/outlook/HP101024441033.aspx (ignore the part where it says Exchange 2007 must run on Windows 2003 - running on Windows 2008 is OK too.) Carl From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Brian Baxter Sent: Wednesday, November 19, 2008 5:21 PM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Problem that I can not find an answer to... Ok here is the situation... All of our workstations have Office XP loaded on them, and our employees are using Outlook Exchange XP. We have some Execs that have laptops that are running Office 2007 and Outlook 2007. Now these people on laptops are set up to POP into our Exchange server, while all our desktops are directly connected to our Exchange 2007 Server. When ever one of the users tries to reply to one of the Execs on POP, their Outlook errors out and Shuts down. If the Exec sends the email via the web using OWA, then no one has a problem repling to them, it is only when they send an email when they are POPed in. Enviroment: Server 2008 Exchange 2007 standard Workstations loaded Windows XP and Office XP Laptop's Loaded Windows XP, Offive 2007 Does this make since to anyone out there? Need more information, just email me!! Thanks, Brian Baxter