The Id associated with the specific Zoho Books organization you wish to connect to.
In Zoho Books, your business is termed as an organization. If you have multiple businesses, you simply set each of those up as an individual organization. Each organization is an independent Zoho Books Organization with its own organization ID, base currency, time zone, language, contacts, reports, etc. If the value of Organization Id is not specified in the connection string, then we will make a call to get all the available organizations and will select the first organization Id as the default one.