Microsoft Teams experienced an outage on Friday that blocked access for some and led to what Microsoft calls “multiple issues” for many users.

The issue began around 8 a.m. Friday and grew rapidly in scope, according to outage tracker DownDetector. Users complained of an inability to access the service, delays in sending and receiving messages, and issues displaying graphics.

Teams is a messaging and videoconferencing app with over 320 million monthly average users as of September 2023.

Microsoft’s public tweets on the subject have pointed to additional detail available in a document posted in an administrative dashboard for Microsoft 365 software. 

Microsoft offered a somewhat bleaker outlook to its customers in that document, which was obtained by The Associated Press. The document detailed roughly a dozen different issues caused by the outage, including inability to log into the service, missing or delayed messages, and inability to access or view images, video, audio recordings and other media.

In an update at 1:26 p.m. Friday, the company said its efforts to route around problems had led to issues with backend parts of its system that effectively “throttled” data traffic.

At 2:02 p.m., Microsoft also acknowledged that “many customers remain impacted by this issue” but said the company is seeing “a reduction in errors and an increase in (service) availability.”

The company has also said was working to address specific failures of Teams functions in parallel with its broader network efforts.