A security vulnerability in Exchange Online allows email sender spoofing under certain conditions, facilitating phishing and social engineering attacks.
An Exchange security vulnerability allows emails to be sent from arbitrary sender addresses when hybrid configurations with third-party mail servers are used.
An outage in Microsoft’s Exchange Online transport pipeline (incident EX1331830) caused multi-hour email delays and delivery failures in North America, Europe, and Asia-Pacific.
A widespread service failure in Microsoft Exchange Online disrupts email delivery in North America and Germany and could jeopardize regulatory notification obligations.
