A ransomware attack on supply chain software giant Blue Yonder continues to cause disruption to the company’s customers, almost two weeks after the outage first began.

In a brief update to its cybersecurity incident page on Sunday, Arizona-based Blue Yonder said it is making “good progress” in its recovery from the attack, which hit its manage services hosted environment on November 21. The company said that “several” impacted customers have been brought back online, but added that it is “actively working” with others to “return them to normal business operations.”

It’s still not known how many customers have been affected and Blue Yonder spokesperson Marina Renneke declined to say when asked by TechCrunch on Monday.

U.K. supermarket chains Morrisons and Sainsbury’s confirmed to TechCrunch last week that they had been affected and U.S. coffee giant Starbucks said the ransomware attack was forcing managers to manually calculate employees’ pay.