Exchange Online
Microsoft to block Exchange Online access for outdated mobile devices
Microsoft announced on Monday that it will soon block mobile devices running outdated email software from accessing Exchange Online services until they’re updated. As the Exchange Team explained, devices running Exchange ActiveSync versions below 16.1 will no longer be able to connect to Microsoft’s cloud email service after March 1, 2026. Exchange ActiveSync (EAS) is a Microsoft Exchange […]
Microsoft: Exchange Online outage blocks access to Outlook mailboxes
Microsoft is investigating an Exchange Online service outage that is preventing customers from accessing their mailboxes using the classic Outlook desktop client. Microsoft first acknowledged the incident (tracked under EX1189820) at 09:57 AM UTC and, according to user reports on the DownDetector outage monitoring platform, it’s also causing server connection and login issues. “Users may be unable to […]
Microsoft 365 outage blocks access to Teams, Exchange Online
Microsoft is working to resolve an ongoing outage preventing users from accessing Microsoft 365 services, including Microsoft Teams, Exchange Online, and the admin center. While Redmond has yet to disclose which regions are currently affected, it currently tracks it on the Service Health Dashboard as an incident, which is commonly used to describe a critical […]
Microsoft enables Exchange Online auto-archiving by default
Microsoft is enabling threshold-based auto-archiving by default in Exchange Online to prevent email flow issues caused by mailboxes filling up faster than expected. While users can also configure messaging records management (MRM) time-based archive policies that provide automatic archival every two years, for example, these policies aren’t effective when dealing with high volumes of incoming emails […]
New bug in classic Outlook can only be fixed via Microsoft support
Microsoft is investigating a known issue that causes the classic Outlook email client to crash upon launch, which can only be resolved via Exchange Online support. According to a recently published support document, this impacts Microsoft 365 customers who use classic Outlook on Windows systems. While the company didn’t specify the root cause of this ongoing issue, […]
Microsoft fixes Exchange Online outage affecting users worldwide
Microsoft says that it has mitigated an Exchange Online outage affecting customers worldwide, which blocked their access to emails and calendars. “We’re investigating an issue affecting a portion of infrastructure in North America, where users may be unable to access their mailbox via any Exchange Online connection method,” the company said on Thursday morning. According to user reports on DownDetector, the […]
Microsoft: Anti-spam bug blocks links in Exchange Online, Teams
Microsoft is working to resolve a known issue that causes an anti-spam service to mistakenly block Exchange Online and Microsoft Teams users from opening URLs and quarantine some of their emails. In a service alert seen by GeekFeed, the company stated that the issue is caused by the anti-spam engine incorrectly tagging URLs contained within other URLs […]
Microsoft working on fix for ongoing Outlook email issues
Microsoft is working to resolve an Exchange Online issue causing email access problems for Outlook mobile users who use Hybrid Modern Authentication (HMA). HMA is a Microsoft Exchange Server feature that allows users to access on-premises mailboxes using authorization tokens from the cloud. Tracked under EX1137017 in the Microsoft 365 Admin Center, this known issue is caused by a recent […]
Microsoft: DNS issue blocks delivery of Exchange Online OTP codes
Microsoft is working to fix a DNS misconfiguration that is causing one-time passcode (OTP) message delivery failures in Exchange Online for some users. Recipients may receive a single-use access code via a separate email to open an encrypted message in Gmail, Yahoo, or other email clients without a Microsoft 365 subscription. This OTP message allows them to view […]
Microsoft Defender for Office 365 now blocks email bombing attacks
Microsoft says its Defender for Office 365 cloud-based email security suite will now automatically detect and block email bombing attacks. Defender for Office 365 (formerly known as Office 365 Advanced Threat Protection or Office 365 ATP) protects organizations operating in high-risk industries and dealing with sophisticated threat actors from malicious threats from email messages, links, […]