What is a key difference between version 1 and version 2 of tenant restrictions?

The correct choice highlights a significant enhancement in tenant restrictions between version 1 and version 2. In version 2, the ability to define third-party access to a tenant allows organizations to have more control and flexibility in managing who can access specific resources. This capability is particularly important in complex environments where third-party applications and services interact with enterprise systems.

By permitting the definition of third-party access, version 2 empowers organizations to establish clearer security boundaries while still utilizing the benefits offered by external partners or services. This is a substantial upgrade from version 1, which did not offer such granularity in managing tenant access.

The other options, while touching on various aspects of the versions, do not encapsulate the pivotal improvement that version 2 brings in terms of third-party access, which is crucial for modern digital transformation strategies and the growing reliance on external services.