·        http://support.microsoft.com/kb/328841

·        http://support.microsoft.com/kb/245822

·        Exchange 2003 - http://support.microsoft.com/kb/823166

·        Exchange 2007 - http://technet.microsoft.com/en-us/library/bb332342(EXCHG.80).aspx

·        Exchange 2010 - http://technet.microsoft.com/en-us/library/bb332342.aspx