Microsoft Teams is experiencing a service outage that has blocked access and limited features for some users.

The outage began Friday at around 11 a.m. Eastern Time, with reports of technical issues spiking in the afternoon and peaking shortly before 2 p.m. More than 14,500 service incidents were reported by then, outage tracker DownDetector’s data shows. By 5:44 p.m., the number of reports fell to a little less than 1,100, according to the tracker.