One week ahead of her planned testimony, Ivanka Trump has appealed Judge Engoron's decision to require her to testify in person at the Trump Organization's fraud trial.

Ivanka Trump's lawyer Bennet Moskowitz asked an appellate court to decide whether Engoron has jurisdiction to compel her testimony and whether the trial subpoenas issued by the New York attorney general were properly served.

Ivanka Trump, who is not a defendant in the case, is currently scheduled to testify next Wednesday as the final witness in the attorney general's case before the defense presents its case.

Donald Trump Jr. has arrived at the New York State Supreme Courthouse with his attorney.

Unlike his father and his brother Eric Trump -- who have visited the courtroom to watch the proceedings – Donald Trump Jr. has not stepped foot inside the courthouse for the trial until today.

A Trump Organization executive vice president, Trump Jr. is scheduled to testify in the case this afternoon.

Defense lawyer Jesus Suarez spent the first hour of his cross-examination working to cast doubt on expert Michiel McCarty's analysis, which found that Trump defrauded lenders out of $168 million in interest.

"Who created the universe of documents for you to review? It was the New York attorney general, right?" Suarez said before launching into a rapid-fire succession of questions regarding which lenders McCarty had spoken to in the course of his analysis.

"Did you ever interview anyone from Deutsche Bank?" Suarez asked.

"No," McCarty said.

"Did you ever interview anyone from Ladder Capital?" Suarez asked.

"No," McCarty repeated.

"Did you ever interview anyone from Mazars," Suarez asked.

"No," McCarty responded.

"Did you ever interview anyone from the Trump Organization?" Suarez asked.

"No," McCarty said again.

Only 15 minutes into what is expected to be a three-hour cross-examination, Judge Arthur Engoron snapped at defense lawyer Jesus Suarez for asking redundant questions.

"I see why this is going to take two or three hours. Some questions become three or four more questions," Engoron said, interrupting the cross-examination to request that Suarez shorten his questions.

That prompted Trump lawyer Chris Kise to criticize Engoron for placing an unfair standard on the defense team.

"You never give them speeches. You never limit their questions," Kise said about Engoron's approach to the attorney general's legal team. "I think it's unfair."

Kise stressed that the cross-examination of the state's sole expert witness is particularly important since his testimony is likely to play into the judge's calculation of Trump's potential fine.

"This witness is the only witness they have that even hints ... about ill-gotten gains," Kise said.

Engoron, however, refused to back down.

"I stand by my rulings and statements," the judge said.

Ivanka Trump must appear to testify at her father’s fraud trial, Judge Arthur Engoron decided from the bench Friday morning.

“I want to see her in person. That is how we prefer testimony,” Engoron said after denying Ivanka Trump’s motion to quash the trial subpoenas she was served.

While Ivanka Trump was not in attendance at Friday's hearing, her lawyer Bennet Moskowitz argued that the state’s justification for bringing Ivanka to the courtroom “falls on its face.”

Characterizing the state’s argument as “a bridge too far,” Moskowitz reiterated that Ivanka neither lives nor has done business in New York since 2017.

State attorney Kevin Wallace defended the subpoenas by arguing Ivanka Trump was a former Trump Organization executive who was the main contact with lenders for Trump’s Washington D.C. Old Post Office hotel. Wallace added that Ivanka Trump still owns properties in New York and operates business here.

Ruling from the bench after a short break, Engoron found that the state presented sufficient evidence to prove that Ivanka does business in New York.

“Ms. Trump owns property in New York and has done business in New York,” he said.

Engoron added that her testimony should not be scheduled before next Wednesday to allow her lawyers to appeal his ruling.

“A trial is a search for the truth, and the law is entitled to every person’s evidence,” Engoron said.