Stay updated on Office 365 security features, threats, and best practices. Protect your data with the latest info on Office 365 information security.
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Background for this topic.
Office 365 is a suite of cloud-based productivity applications and services offered by Microsoft that includes email, word processing, spreadsheets, and collaboration tools. When discussing Office 365 in the context of information security, it encompasses the security practices, policies, and technologies that protect data and communication associated with these applications from unauthorized access, cyber threats, and data breaches.
Ensuring security in Office 365 involves a combination of built-in features such as data encryption, multi-factor authentication, threat detection, and compliance tools, in addition to user-driven initiatives like robust password policies, regular security training, and adherence to best practices in information handling. As cyber threats evolve, the information security considerations surrounding Office 365 also involve staying abreast of the latest security updates, patches, and best practices recommended by Microsoft and the broader cybersecurity community.
Weekly headline count for the current query.
Microsoft is working to address a widespread service issue affecting the mail flow pipeline for Exchange Online customers across North America and Germany. [...]
Microsoft readies the axe once again for yesterday's security
Microsoft readies the axe once again for yesterday's security Microsoft has warned users still clinging to legacy TLS versions that the end is nigh for TLS 1.0 and 1.1 on POP3 and IMAP4 connections to Exchange Online.…
Microsoft says it will start blocking legacy TLS connections for POP and IMAP email clients in Exchange Online starting in July 2026. [...]
Microsoft is investigating and working to resolve Exchange Online mailbox access issues that have intermittently affected Outlook mobile and macOS users for weeks. [...]
Microsoft is working to address an ongoing service issue that has intermittently prevented some users from accessing their cloud-based Exchange Online mailboxes via Outlook mobile and Mac desktop clients since Thursday. [...]
Microsoft is working to address an ongoing Exchange Online outage that is preventing customers from accessing their mailboxes and calendars. [...]
Microsoft says an Exchange Online issue that mistakenly quarantined legitimate emails last week was triggered by faulty heuristic detection rules designed to block credential phishing campaigns. [...]
Microsoft is investigating an ongoing Exchange Online issue that mistakenly flags legitimate emails as phishing and quarantines them. [...]
Microsoft announced today that the Exchange Web Services (EWS) API for Exchange Online will be shut down in April 2027, after nearly 20 years. [...]
Microsoft is working to fix an Exchange Online service outage that intermittently prevents users from accessing their mailboxes via the Internet Mailbox Access Protocol 4 (IMAP4). [...]
Microsoft said that Office 365 tenants with weak configurations and who don't have strict anti-spoofing protection enabled are especially vulnerable.
Negative feedback sinks Redmond's plan to cap outbound email recipients Microsoft has backed away from planned changes to Exchange Online after customers objected to limits designed to curb outbound email abuse.…
Microsoft announced today that it has canceled plans to impose a daily limit of 2,000 external recipients on Exchange Online bulk email senders. [...]
Microsoft announced on Monday that it will soon block mobile devices running outdated email software from accessing Exchange Online services until they're updated. [...]
Cybersecurity researchers have shed light on a cross-tenant blind spot that allows attackers to bypass Microsoft Defender for Office 365 protections via the guest access feature in Teams
Microsoft is investigating an Exchange Online service outage that is preventing customers from accessing their mailboxes using the classic Outlook desktop client. [...]
Microsoft has reminded that Exchange Server 2016 and 2019 reached the end of support and advised IT administrators to upgrade servers to Exchange Server SE or migrate to Exchange Online. [...]