http://technet.microsoft.com/en-us/library/cc759262(v=ws.10).aspx
msiexec /quiet /norestart /log c:\temp\install.log /i \\server\share\setup.msi
msiexec /qb /i \\server\share\setup.msi
msiexec /q /i \\server\share\setup.msi

Before installing anything on a Terminal Server you need to put it into Install Mode, and then Execute Mode once you’ve finished!

change user /install
User session is ready to install applications.

change user /execute
User session is ready to execute applications.

csvde -m -f c:\users.txt -d “OU=staff,OU=users,DC=domain,DC=local” -r “(&(objectClass=*)(mail=*))” -l member,displayName