The civil fraud trial of former President Trump, his adult sons, and Trump Organization executives enters its third week with a notable schedule change.

Trump's former lawyer and so-called "fixer" Michael Cohen, who was initially scheduled to begin his testimony on Tuesday, has delayed his court appearance due to a preexisting medical condition.

"I look forward to testifying and correcting the record as to the multiple misstatements and responses by previous witnesses who stated … 'I don't recall.' Unfortunately for them, I do," Cohen told ABC News on Saturday.

Trump is expected to attend multiple days of the trial beginning on Tuesday, according to sources familiar with his plans.

In the meantime, Trump Organization executive Patrick Birney is expected to conclude his testimony this morning.

Birney is scheduled to be followed on the stand by Mark Hawthorn, the chief accounting officer at Trump Hotels.

Trump Organization executive Patrick Birney was once pressured by his former CFO, Allen Weisselberg, to use an unrealistic metric to inflate the value of Trump Tower, Birney testified.

Birney testified that he consulted a generic real estate report to determine a 2.67% capitalization rate to measure the value of Trump Tower -- despite an executive at real estate company Cushman and Wakefield recommending a higher rate, which would have decreased Trump Tower's value.

When Weisselberg and Birney discussed the topic in a Trump Tower restroom, Birney said he encouraged the CFO to use a higher, more realistic capitalization rate that would be more sustainable, in order to maintain the building's value in the future, Birney testified.

"I think he said, just use 2.67%," Birney recalled. "I said I am fine using that capitalization rate, but I am worried that if we are only using 2.67, the building is so old, next year there might not be a cap rate as low as 2.67."

The New York attorney general alleges that Weisselberg "systematically rejected" multiple valuations of Trump Tower in 2019 that would have lowered its value between $161 and $224 million.

Court has adjourned for the day, with Birney scheduled to continue his testimony on Monday morning.

Trump Organization executives considered adding $144 million to Trump's net worth based on a "premium for presidential property" in 2017, according to testimony of executive Patrick Birney.

The premium, which was applied to draft versions of Trump's financial statements, varied between 15% and 35% for Trump's properties, including his Mar-a-Lago Club, which was described in documents as the "presidential winter residence," according to materials entered into evidence.

The potential adjustment followed a $200 million shortfall between Trump's 2016 and 2017 statements, after a Forbes magazine article prompted executives to revalue the former president's penthouse, state attorneys said.

"Who directed you?" state attorney Eric Haren asked Birney about adding the premium.

"I don't really remember, but probably Allen Weisselberg," Birney said.

Birney testified that the premium was eventually removed from the 2017 statement, according to a document that tracked changes made to the statement. He did not provide additional context about why the premium was removed.

Trump Organization executive Patrick Birney will continue his testimony this morning on Day Nine of the trial.

Roughly 40 years younger than ex-Trump Organization CFO Allen Weisselberg -- his former boss and the previous witness in the trial -- Birney testified yesterday that he largely relied on Weisselberg and controller Jeffrey McConney to put together Trump's annual financial statements.

"I was not the final decision maker," said Birney, who was an assistant VP during that time period.

State attorney Kevin Wallace highlighted Birney's statements during his opening statement as evidence of an alleged conspiracy within the Trump Organization to inflate Trump's net worth.

"He likes to see it go up," Birney said, according to Wallace.

If Birney completes his testimony today, Trump Hotels chief accounting officer Mark Hawthorn is scheduled to testify next.

Judge Engoron again denied a request from the defense to subpoena the Trump Organization's independent monitor for testimony.

Twice this week, Trump's attorneys unsuccessfully sought to call to the stand former judge Barbara Jones, the monitor appointed by Engoron to oversee the Trump Organization's finances after the New York attorney general accused the firm of fraud.

Trump attorney Chris Kise tried for a third time Friday.

"We should be entitled to the benefit of having Judge Jones here to respond to those questions about any ambiguities that might exist in her reports," Kise said.

State attorney Andrew Amer argued against the request, citing Jones' immunity as an agent of the court.

"Your request to subpoena Judge Jones is denied," Engoron said, describing the request as a "dangerous infringement on court immunity."

In her latest report issued to Engoron this week, Jones reported that the Trump Organization was "in compliance" but under "enhanced monitoring."

Court was subsequently adjourned for the day following Engoron's ruling.