ActiveSync 3.7
http://www.microsoft.com/downloads/details.aspx?FamilyID=67e9e87c-ca96-48b4-b5d4-f3e047ca5108&DisplayLang=en

ActiveSync 3.7 - German
http://www.microsoft.com/downloads/details.aspx?displaylang=de&FamilyID=67E9E87C-CA96-48B4-B5D4-F3E047CA5108

Microsoft ActiveSync 3.8
http://www.microsoft.com/downloads/details.aspx?FamilyID=d2645c21-8a85-45a2-8d13-653beb6cdddc&DisplayLang=en

Microsoft ActiveSync 3.8 - German
http://www.microsoft.com/downloads/details.aspx?FamilyID=2a856b0c-cadf-43b8-95f8-9de5f5e4fc9f&DisplayLang=en

Microsoft ActiveSync 4.2
http://www.microsoft.com/downloads/details.aspx?FamilyID=7269173a-28bf-4cac-a682-58d3233efb4c&DisplayLang=en

Microsoft ActiveSync 4.2 - German
http://www.microsoft.com/downloads/details.aspx?FamilyID=b5a8b224-6604-42fa-8777-faa1f70e99e5&DisplayLang=de