CrowdStrike (CRWD.O) announced on Sunday that a large proportion of the 8.5 million Microsoft (MSFT.O) machines that were disrupted by a global tech outage caused by a software update were back online and running.

CrowdStrike has contributed to the development of a scalable solution that will help Microsoft’s Azure infrastructure hasten a fix, according to Microsoft, which also stated that the tech giant collaborated with Amazon Web Services and Google Cloud Platform to identify the “most effective approaches.”