Learn Finnish: Ilman käyttöoikeutta järjestelmän dokumentit eivät ole saatavilla. - Without an access right, the documents of the system are not available.

It is built from the verb saada (to get, to receive). First, it forms the passive present participle saatava ("to be gotten"). Then, it takes the plural stem saatavi- and adds the adessive case ending -lla. While literally meaning "on the things to be gotten", it is the standard Finnish way to express that something is available.

The lesson mentions both -tavissa and -tavilla. Could we say eivät ole saatavissa here?

Yes, saatavissa is grammatically correct and means essentially the same thing. In everyday usage, saatavilla is the most common choice for general availability, like accessing files or goods. saatavissa is slightly more often used when something can be extracted or retrieved from within a specific source, but they are highly interchangeable.

Why is the word käyttöoikeus (access right) in the form käyttöoikeutta?

The preposition ilman (without) requires the noun that follows it to be in the partitive case. For nouns ending in -us or -ys, like käyttöoikeus, the partitive is formed by changing the final -s to -tta, resulting in käyttöoikeutta.

Why doesn't the negative verb eivät trigger the partitive case for dokumentit?