Microsoft says that sales of its big Surface Hub touchscreen Windows 10 PCs for business customers have 'exceeded initial forecasts'. The company added that it is "ramping up production" to meet demand.

The big 55-inch and 84-inch PCs began shipping in March, for the price of $8,999 and $21,999, respectively. However, Petri reports that some potential customers have recently been unable to purchase Surface Hub models. In a statement sent to the site, Microsoft stated:

Demand for Surface Hubs is very strong and exceeded initial forecasts. To date, we've shipped to over 500 customers worldwide and that number continues to grow. We are ramping up production to meet this strong demand via our partner reseller channel as soon as possible. Customers are encouraged to speak with their sales representative if interested in ordering Surface Hubs.

Microsoft has not offered any specific sales or unit shipment numbers for the Surface Hub.