@maporsche,
I think you're mixing up two things.
Both the Secret Service and the Pentagon rented space in Trump Tower. The space rented by the Pentagon is used for the White House Military Office, which provides services and communications and handles the nuclear football. The space rented by the Secret Service was used as the Secret Service command post for Trump Tower.
The Pentagon rents from a private owner. The Secret Service was directly renting from Trump's company.
The Secret Service moved out, with reports
saying that "the sticking points included the price and other conditions of the lease."
Since Trump never divested from the Trump Organization, he was personally profiting from having the Secret Service rent space in Trump Tower.