Hillary Clinton. AP Donald Trump chastised Hillary Clinton in tweets on Thursday morning, a day after the release of the State Department inspector general's report on the private email server she used while she was secretary of state.

"The Inspector General's report on Crooked Hillary Clinton is a disaster," Trump said on Twitter. "Such bad judgement and temperament cannot be allowed in the W.H."

The report was highly critical of Clinton, finding that the Democratic presidential frontrunner "did not comply" with State Department policies when she chose to use a personal email account to conduct government business.

The State Department faulted Clinton and previous secretaries of state for poorly managing email and other computer information and for slowly responding to new cybersecurity risks.

The report cited "longstanding, systemic weaknesses" related to communications that precede Clinton's appointment as secretary of state. But the inspector general's report singled out Clinton's failures as more serious.

"At a minimum, Secretary Clinton should have surrendered all emails dealing with department business before leaving government service and, because she did not do so, she did not comply with the Department's policies that were implemented in accordance with the Federal Records Act," the report said.

Clinton's email scandal has dogged the 2016 Democratic presidential frontrunner for more than a year. She first acknowledged in March 2015 that she exclusively used a private email account to send and receive work-related emails while she served as secretary of state. The controversy compelled her to hand over roughly 30,000 work-related emails to the State Department. Those emails have been released to the public in batches since last year.

But she deleted about 30,000 additional emails from her server that she says were "personal" in nature before handing the server over to the FBI in August, five months after she provided the individual emails to the State Department.

At about the time Clinton handed over the server, a House committee requested access to it to ensure that she had not deleted any work-related emails. But her lawyer, David Kendall, told the committee that Clinton aides had changed the server's settings so that only emails she sent and received in the previous 60 days would be saved.

Natasha Bertrand contributed to this report.