"Michael's" is the possessive form of Michael, showing that something belongs to him. It can also stand for his home, workplace, or business when the noun is left out.
According to Albanian Communist leader Enver Hoxha 's account of his conversations with the Romanian Communist leaders on the monarch's abdication, it was Gheorghiu-Dej, not Groza, who forced Michael's abdication at gunpoint. Source: Internet
A non-quirister choir sings the services in St Michael's Church. Source: Internet
And Laurie, well, she's so damaged by surviving Michael's rampage that at some points it seems she'd rather be dead. Source: Internet
Around the time of the marriage, Sir Michael's nephew, the barrister Robert Audley, welcomes his old friend George Talboys back to England, after three years of gold prospecting in Australia. Source: Internet
After Michael's death, Joseph Jackson sued when it was disclosed that he was not included in Michael's will. Source: Internet
At that time, Michael's grandparents were living in Danville, Québec. Source: Internet