Crowdstrike is a now-public cybersecurity company that was managing security for DNC website and email (note: that's not the same as managing a single server - in fact most of the website data was in the cloud, spread over 140 servers. Crowdstrike and FBI made snapshots of entire website data and structure for forensic analysis, before clearing servers to wipe out Russian malware and rebuild website from scratch.)
Crowdstrike was the first one to get the call when DNC suspected a breach of their computers.
CTO of Crowdstrike is Dmitri Alperovich, who was born in Russia and is a naturalized American citizen which likely makes him more patriotic American than Trumps who care mostly about American $Dollars and self-aggrandisement.
Alperovitch is also a senior fellow at the Atlantic Council, which received funding from the Viktor Pinchuk Foundation. Pinchuk, a Ukrainian billionaire, has previously donated to the Clinton Foundation but had no known investment in Crowdstrike.
"With regards to our investigation of the DNC hack in 2016, we provided all forensic evidence and analysis to the FBI," CrowdStrike said in a statement. "As we've stated before, we stand by our findings and conclusions that have been fully supported by the US Intelligence community."
Trump adviser Roger Stone's legal team alleged the 2016 hack was an inside job and that CrowdStrike tampered with the evidence to pin the activity on Russian hackers. Stone's legal team used this argument to claim of the U.S. government's warrants in the case were invalid.
Stone has been indicted for making false statements before congressional committees and has a history of spreading conspiracy theories online.
This is not the first time Trump has brought up the missing server conspiracy theory " he raised similar questions during his press conference with Russian President Vladimir Putin in July last year.
"You have groups that are wondering why the FBI never took the server," Trump said last year. "Why didn't they take the server? Where is the server, I want to know, and what is the server saying?"
Why did President Trump mention CrowdStrike to the Ukrainian president?
Russia Hackers to Blame for Wikileaks Emails - Proof Vladmir Putin Was Behind the Clinton Email Hack (October 20, 2016 - before most people even heard of DNC hack)
"How Russia Pulled Off the Biggest Election Hack in U.S. History"
"The inside story of kompromat."
Russian Expat Founds CrowdStrike to Guard Against Russian Email Hackers - Who Is Dmitri Alperovitch? (October 27, 2016)
"The Man Leading America's Fight Against Russian Hackers Is Putin's Worst Nightmare"
"In a war against hackers, Dmitri Alperovitch and CrowdStrike are our special forces"