Microsoft is in one of the best buy cycles we've seen for a long time, says Jefferies' Brent Thill

Brent Thill, Jefferies equities research analyst, joins 'Squawk on the Street' to discuss Microsoft as the company's stock closed at an all-time high on Tuesday, how durable Thill's price target of $400 is, and the data points to judge Microsoft's generative AI products.