Factory

public class MSExchangeConfig implements FactoryBean<ExchangeService> {

.
.
.

@Override
    public ExchangeService getObject() throws Exception {
        ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2010_SP2);
        ExchangeCredentials credentials = new WebCredentials(getUsername(), getPassword());
        service.setCredentials(credentials);
        try {
            service.setUrl(new URI(getUri()));
        } catch (URISyntaxException ex) {
            logger.error("URL problem when connecting to Exchange");
            logger.trace("{}", ex);
            throw new ExchangeServiceNotBuiltException();
        }
        return service;
    }

    @Override
    public Class<ExchangeService> getObjectType() {
        return ExchangeService.class;
    }

    @Override
    public boolean isSingleton() {
        return false;
    }
}