BlackBerry confirmed that “uncertainty surrounding its ongoing strategic review” may have impacted demand for its products in the period to 31 August, and that it had seen a “slower than anticipated adoption of the BES 10 platform by enterprise customers”, which in turn impacted device sales.

On Friday, the company reported a loss of $965 million, compared with a $235 million loss in the year-ago period, on revenue of $1.57 billion, down from $2.86 billion.

Underpinning this was an inventory charge of $934 million related to its Z10 device, the smartphone which led the rollout of the company’s BlackBerry 10 platform – but was met with lacklustre demand.

Last week, Thorsten Heins, BlackBerry’s CEO, said that the company “continues to see confidence from our customers through the increasing penetration of BES 10, where we now have more than 25,000 commercial and test servers installed to date, up from 19,000 in July 2013.”

But today the company said that “delays in the launch of certain functionality of the BES 10 platform and alternative competitor products in the market have resulted in a slower than anticipated rate of adoption of the BES 10 platform by enterprise customers, many of which look to deploy BlackBerry 10 hardware and software simultaneously to optimise security through the integrated BlackBerry end-to-end solution”.

This is worrying news for BlackBerry, which last month said it is set to focus on enterprise and prosumer markets, rather than pushing BlackBerry as a consumer proposition. And it comes shortly after research firm Gartner advised enterprises to explore alternatives to BlackBerry in the face of its ongoing woes – a position the company itself said is “purely speculative”.

The documents also revealed that its “ongoing efforts to streamline its operations” under its CORE programme, which includes cutting around 40 per cent of its global workforce, means that BlackBerry expects to incur $400 million in charges throughout fiscal 2014 and to the end of Q1 fiscal 2015.

This is up from its earlier expectation of $100 million through fiscal 2014.

In addition to uncertainty related to the review, BlackBerry said that its proposed acquisition by a consortium led by Fairfax Financial, and its operation restructuring and workforce cuts, “may adversely impact the company’s business, existing and future relationships with business partners and end customers of its products and services, and its ability to attract and retain key employees”.