You are working on a solution that involves exporting to a Microsoft Exchange 2010 server.  We have encountered several different errors when exporting information to Microsoft Exchange 2010, because we utilize WinRM to execute the Microsoft Exchange PowerShell CMDLET called Update-Recipient.  Here are some resources covering issues that we have encountered with this process.

In most cases, we need to utilize some WinRM troubleshooting as well.  Here are some links to help out with WinRM troubleshooting.