In a rather unusual arrangement, two Cloud rivals Microsoft and Oracle have announced an interoperability partnership enabling customers to migrate and run mission-critical enterprise workloads across Microsoft Azure and Oracle Cloud.

“With this partnership, our joint customers can migrate their entire set of existing applications to the cloud without having to re-architect anything, preserving the large investments they have already made,” he said in a statement late Wednesday.

This direct interconnect is available starting today in Ashburn (North America) and Azure US East, with plans to expand additional regions in the future, the companies announced.