Before we start the installation itself, there are some prerequisites to make sure are sorted out. The majority of them will be installed by the setup utility,b ut there are others to consider.
Firstly, the Web Services should not be installed on either the SQL Server or an end-user accessible machine. If you’re going to make the Web Services externally accessible, they should be installed on a web server or similar machine.
Secondly, a Domain account is required for the Web Services service to run under. During installation, this service should have local administrator permissions.
Thirdly, all companies which will have the Web Services deployed, needs to have a Functional Currency set. This is needed even if you are not using Multicurrency; in this case, you will need to configure it for use anyway.. When you do so, if you have a lot of hsitorical transactions, plan ahead and allow a lot of time to run Check Links.