What are Cross-domain Reports?
The CLM InfoCenter for an Express Install has the following comment:
To get started quickly with a small deployment using the default topology and Derby databases, skip to the next step and Install the server. Derby deployments are limited to 10 users and do not permit cross-domain reports.
To get started quickly with a small deployment using the default topology and Derby databases, skip to the next step and Install the server. Derby deployments are limited to 10 users and do not permit cross-domain reports.
(my bold).