On the 28th of February, Microsoft president, Brad Smith, posted the following information:
Several hours before the launch of missiles or movement of tanks on February 24, Microsoft’s Threat Intelligence Center...detected a new round of offensive and destructive cyberattacks directed against Ukraine’s digital infrastructure. We immediately advised the Ukrainian government about the situation, including our identification of the use of a new malware package (which we denominated FoxBlade), and provided technical advice on steps to prevent the malware’s success.
When and under what circumstances did Microsoft's threat intelligence center begin working with the Ukrainian government?