EXFO Files Amended Annual Report for Fiscal 2016

• Amended Management's Annual Report on internal control over financial reporting and Sarbanes-Oxley certifications from CEO and CFO
• No material impact on previous three years' consolidated financial statements

QUEBEC CITY, Jan. 9, 2017 /PRNewswire/ - EXFO Inc. (NASDAQ: EXFO) (TSX: EXF) announced today it has filed an amended Annual Report on Form-20-F/A for fiscal 2016 with the U.S. Securities and Exchange Commission (SEC) and Canadian securities commissions.

Subsequent to the original filing of its Annual Report on Form 20-F for fiscal 2016 on November 28, 2016, EXFO management identified a material weakness in the company's internal control over financial reporting, resulting in the improper aging of its trade accounts receivable ledger which led to an incorrect assessment of bad debt expense against a single trade account receivable. Specifically, the company did not maintain sufficient controls over the trade accounts receivable ledger, which included failure to maintain appropriate segregation of duties as well as lack of supervisory review and monitoring of journal entries recorded to the trade accounts receivable ledger.

EXFO management determined that the identified control deficiencies could have resulted in a material misstatement of the aforementioned account balances or disclosures that would not have been prevented or detected, and therefore these control deficiencies represent a material weakness in internal control over financial reporting. Considering the identified material weakness, the company's Chief Executive Officer and the Chief Financial Officer have concluded that internal controls over financial reporting were not effective as of August 31, 2016.

Although EXFO management determined that the errors were not material to the previously issued consolidated financial statements and disclosures in its Annual Report on Form 20-F for the year ended August 31, 2016, management revised its previously issued consolidated financial statements to reflect the correction of the bad debt expenses in the proper periods. The revisions do not constitute a restatement of prior years' financial statements.

The impact of the revision on EXFO's consolidated financial statements as at and for the year ended August 31, 2016 are non-cash and therefore do not affect the company's statements of cash flows for any of the prior periods and do not affect the company's consolidated statements of earnings for the year ended August 31, 2016. The impact on net earnings amount to a reduction of US$441,000 and US$527,000 for the fiscal years ended August 31, 2015 and 2014, respectively.

The quantitative impact of the revision is shown in Exhibit 1 at the end of this news release. For more detailed information, refer to EXFO's amended Annual Report on Form 20-F/A and Note 1 to the company's revised consolidated financial statements.

In summary, EXFO has filed an amended Annual Report on Form 20-F/A for the fiscal year ended August 31, 2016 with the SEC and Canadian securities commissions, along with revised consolidated financial statements and management's discussion and analysis (MD&A) for the year ended August 31, 2016, as well as amended Management's Annual Report on internal control over financial reporting and certifications from the CEO and CFO, as required by Sections 302 and 906 of the Sarbanes-Oxley Act of 2002. These documents can be found on SEDAR (www.sedar.com) and EDGAR (www.sec.gov/edgar.shtml) under EXFO's profile and at www.EXFO.com.

About EXFO
EXFO is the trusted partner to communications service providers (CSPs) globally with leadership in test automation and 3D analytics solutions to ensure the smooth deployment, maintenance and management of next-generation, physical, virtual, fixed and mobile networks. The company has also forged strong relationships with network equipment manufacturers (NEMs) to develop deep expertise that migrates from the lab to the field and beyond. EXFO's key differentiation comes from combining intelligent, automated and cloud-based test and monitoring solutions with real-time analytics to deliver unmatched end-to-end visibility and assurance—from a network, services and end-user level. EXFO is no. 1 in portable optical testing and boasts the largest active service assurance deployment worldwide. For more information, visit www.EXFO.com and follow us on the EXFO Blog.

Forward-Looking Statements
This press release contains forward-looking statements within the meaning of the U.S. Private Securities Litigation Reform Act of 1995, and we intend that such forward-looking statements be subject to the safe harbors created thereby. Forward-looking statements are statements other than historical information or statements of current condition. Words such as may, expect, believe, plan, anticipate, intend, could, estimate, continue, or similar expressions or the negative of such expressions are intended to identify forward-looking statements. In addition, any statement that refers to expectations, projections or other characterizations of future events and circumstances are considered forward-looking statements. They are not guarantees of future performance and involve risks and uncertainties. Actual results may differ materially from those in forward-looking statements due to various factors including, but not limited to, macroeconomic uncertainty as well as capital spending and network deployment levels in the telecommunications industry (including our ability to quickly adapt cost structures with anticipated levels of business and our ability to manage inventory levels with market demand); future economic, competitive, financial and market conditions; consolidation in the global telecommunications test and service assurance industry and increased competition among vendors; capacity to adapt our future product offering to future technological changes; limited visibility with regards to timing and nature of customer orders; longer sales cycles for complex systems involving customers' acceptances delaying revenue recognition; fluctuating exchange rates; concentration of sales; timely release and market acceptance of our new products and other upcoming products; our ability to successfully expand international operations; our ability to successfully integrate businesses that we acquire; and the retention of key technical and management personnel. Assumptions relating to the foregoing involve judgments and risks, all of which are difficult or impossible to predict and many of which are beyond our control. Other risk factors that may affect our future performance and operations are detailed in our Annual Report, on Form 20-F, and our other filings with the U.S. Securities and Exchange Commission and the Canadian securities commissions. We believe that the expectations reflected in the forward-looking statements are reasonable based on information currently available to us, but we cannot assure that the expectations will prove to have been correct. Accordingly, you should not place undue reliance on these forward-looking statements. These statements speak only as of the date of this document. Unless required by law or applicable regulations, we undertake no obligation to revise or update any of them to reflect events or circumstances that occur after the date of this document.

Exhibit 1 (in thousands of US dollars)

EXFO-F

SOURCE EXFO inc.