Microsoft Exchange Online is experiencing an outage that mainly affects European users. Users have been experiencing delays in sending and receiving emails since around 12:30 p.m. Central European Summer Time. Several users have reported experiencing problems, although the exact extent of the issue is still unclear. Microsoft acknowledges the problems on a support page in the closed admin center. The company states that "some users located in Europe" may experience problems sending or receiving emails via Exchange Online.
A spokesperson for BT stated, "We're currently addressing an issue impacting our services. We're working urgently to fix this issue and will provide a further update as soon as possible."