We have multiple organisations to work with in books.

However, the link to an invloice/salesorder/estimate looks like this:
https://books.zoho.com/app#/invoices/123456789034563456

There is no information about the organisation in this link.

1. There is no way to directly open a specific invoice
You have to open books, select the correct organisation, then you can click on the invoice link.

2. If the organisation is not given (from support or if you just paste the link for someone and forget about organisation), then you or someone else does not know where to find the order.

You may say: "Just give the correct organisation".

But this is still painfull, even if you know the right org - as you open the link, you get "Invoice not found", select organisation, click the link again.
And next time you open books, the default organisation might be selected and you get "Invoice not found" again.

The CRM links include the organisation, this should also be the case for zoho books.

Regards