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.

Former President Donald Trump's plan to deliver part of his closing argument Thursday, as reported yesterday by ABC News, is now in doubt after he failed to meet a deadline to agree to limitations imposed by Judge Arthur Engoron.

According an email exchange between Engonon and defense counsel that was posted to the public docket Wednesday, Engoron said that Trump would have to follow the case's limited gag order, and that he would not be allowed to "impugn" the New York attorney general or her staff -- limitations that Trump attorney Chris Kise rejected, calling them "untenable."

"The limitations I am imposing, in my absolute discretion, are not subject to further debate. Take it or leave it," Engoron replied on Jan. 9, according to the email thread.

When Trump's lawyers missed the first deadline set by Engoron, the judge determined that Trump could not testify. Kise then responded that he did not see the deadline and requested that the closing arguments be postponed because of the death of Melania Trump's mother on Tuesday.

"I am sad to advise the Court that Mrs. Trump's mother passed away this evening. Because of the challenges presented by this deeply personal family matter, President Trump has asked that I request the Court postpone the date for closing argument," Kise wrote yesterday.

Engoron promptly denied the request and said the closings would continue as planned.

"On balance, going forward makes the most sense. Please tell Mr. Trump that I am sorry," Engoron wrote.

Kise informed Engoron that Trump still planned to attend the closings and speak.

"Despite the fact that his Mother-in Law, who he was very close to, passed away late last night, President Trump will be speaking tomorrow," Kise said in an email this morning.

When Engoron asked for assurance that Trump agreed to his rules, Kise pushed back, writing, "You are not allowing President Trump, who has been wrongfully demeaned and belittled by an out of control, politically motivated Attorney General, to speak about the things that must be spoken about."

"I won't debate this yet again. Take it or leave it. Now or never. You have until noon, seven minutes from now. I WILL NOT GRANT ANY FURTHER EXTENSIONS," Engoron replied at 11:54 a.m.

After Kise failed to respond, Engoron emailed him at 12:12 p.m. that he assumed Trump would not be speaking and that their email exchange would be posted to the court's public docket.

Responding to the development, Trump's legal spokesperson, Alina Habba, said in a statement to ABC News: "Is anyone surprised anymore?"