The software giant said it was working on a fix for the issue, which has affected the many companies that use Microsoft’s products. It later said it had fixed all affected services except Outlook on the web.

Microsoft said most Outlook and Teams services had been restored as of Monday evening, after more than 24 hours of technical delays.

Microsoft has announced it is deploying a fix after users reported issues with Outlook and Teams. The problems, caused by a recent change to its Exchange Online