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Microsoft to block Exchange Online access for outdated mobile devices
Microsoft announced on Monday that it will soon block mobile devices running outdated email software from accessing Exchange Online services until they're updated.
- December 16, 2025
- 07:53 AM
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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.
- November 25, 2025
- 11:18 AM
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New Webinar: Choose Your Own Investigation — Browser Attack Edition
Modern attacks have shifted focus to the browser, yet detection tools remain largely blind to the crucial activity happening there.
Join Push Security on February 11th for an interactive "choose-your-own-adventure" webinar on ClickFix, credential phishing, and other in-browser attacks we've observed in the wild.
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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.
- October 08, 2025
- 02:35 PM
- 0
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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.
- October 08, 2025
- 01:49 PM
- 2
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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.
- October 01, 2025
- 02:43 PM
- 6
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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.
- September 11, 2025
- 03:43 PM
- 0
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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.
- September 09, 2025
- 09:40 AM
- 0
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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).
- August 23, 2025
- 10:15 AM
- 2
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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.
- July 02, 2025
- 08:21 AM
- 0
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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.
- June 30, 2025
- 12:04 PM
- 0
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Microsoft fixes Exchange Online bug flagging Gmail emails as spam
Microsoft has resolved an issue with a machine learning model that mistakenly flagged emails from Gmail accounts as spam in Exchange Online.
- May 02, 2025
- 06:15 AM
- 3
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Microsoft fixes Outlook on the web search issues, failures
Microsoft is working on fully mitigating issues causing Outlook on the web and SharePoint Online users to experience delays or failures when searching.
- April 28, 2025
- 11:17 AM
- 0
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Microsoft fixes machine learning bug flagging Adobe emails as spam
Microsoft says it mitigated a known issue in one of its machine learning (ML) models that mistakenly flagged Adobe emails in Exchange Online as spam.
- April 24, 2025
- 03:02 PM
- 1
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Microsoft investigates global Exchange Admin Center outage
Microsoft is investigating an ongoing outage that is blocking admins worldwide from accessing the Exchange Admin Center (EAC).
- April 09, 2025
- 10:39 AM
- 0
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Microsoft: Exchange Online bug mistakenly quarantines user emails
Microsoft is investigating an Exchange Online bug causing anti-spam systems to mistakenly quarantine some users' emails.
- March 21, 2025
- 01:10 PM
- 0
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Microsoft Exchange Online outage affects Outlook web users
Microsoft is investigating an ongoing outage preventing Outlook on the web users from accessing their Exchange Online mailboxes.
- March 19, 2025
- 03:34 PM
- 0
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Week-long Exchange Online outage causes email failures, delays
Microsoft says it partially mitigated a week-long Exchange Online outage causing delays or failures when sending or receiving email messages.
- March 14, 2025
- 02:59 PM
- 11
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Microsoft links recent Microsoft 365 outage to buggy update
Microsoft says a coding issue is behind a now-resolved Microsoft 365 outage over the weekend that affected Outlook and Exchange Online authentication.
- March 03, 2025
- 09:37 AM
- 0
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Microsoft 365 outage impacts Exchange Online, Teams, Sharepoint
Microsoft is working on fixing an ongoing and widespread Microsoft 365 outage that is impacting multiple services and features, including Exchange Online, Microsoft Teams, and SharePoint Online.
- November 25, 2024
- 10:55 AM
- 1
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Exchange Online adds Inbound DANE with DNSSEC for everyone
Microsoft announced today that inbound SMTP DANE with DNSSEC for Exchange Online, a new capability to boost email security and integrity, is now generally available.
- October 28, 2024
- 03:21 PM
- 0
