Super Micro Computer Inc. expects to post sales shy of investors’ expectations and is still unsure when it will file its latest annual report, according to a Tuesday statement. The server maker has been under a cloud in recent months due to scrutiny over its accounting,

Super Micro Computer , whose auditor unexpectedly stepped down last week, on Tuesday flagged uncertainty about the timing of its annual report but said a probe about accounting practices had not found evidence of fraud by the company.

Super Micro, the embattled server maker, reported preliminary first-quarter results on Tuesday. The company is facing several challenges related to its corporate governance. Super Micro said its board of directors found there was no evidence of fraud or misconduct from management after its auditor resigned last week.