Latest Exchange Online news

Microsoft will limit Exchange Online bulk emails to fight spam

Microsoft has announced plans to fight spam by imposing a daily Exchange Online bulk email limit of 2,000 external recipients starting January 2025.
- Sergiu Gatlan
- April 15, 2024
- 03:11 PM
- 0
CISA orders agencies impacted by Microsoft hack to mitigate risks

CISA has issued a new emergency directive ordering U.S. federal agencies to address risks resulting from the breach of multiple Microsoft corporate email accounts by the Russian APT29 hacking group.
- Sergiu Gatlan
- April 11, 2024
- 01:47 PM
- 0
Microsoft still unsure how hackers stole MSA key in 2023 Exchange attack

The U.S. Department of Homeland Security's Cyber Safety Review Board (CSRB) has released a scathing report on how Microsoft handled its 2023 Exchange Online attack, warning that the company needs to do better at securing data and be more truthful about how threat actors stole an Azure signing key.
- Ionut Ilascu
- April 03, 2024
- 08:21 PM
- 0
Microsoft Exchange 2019 has reached end of mainstream support

Microsoft announced the end of mainstream support for its Exchange Server 2019 on-premises mail server software on January 9, 2023.
- Sergiu Gatlan
- January 10, 2024
- 11:43 AM
- 0
Microsoft disables bad spam rule flagging all sent emails as junk

Microsoft has disabled a bad anti-spam rule flooding Microsoft 365 admins' inboxes with blind carbon copies (BCC) of outbound emails mistakenly flagged as spam.
- Sergiu Gatlan
- October 18, 2023
- 04:11 AM
- 2
Exchange Online mail delivery issues caused by anti-spam rules

Microsoft is investigating Exchange Online mail delivery issues causing "Server busy" errors and delays when receiving emails from outside organizations.
- Sergiu Gatlan
- October 11, 2023
- 12:10 PM
- 0
Microsoft breach led to theft of 60,000 US State Dept emails

Chinese hackers stole tens of thousands of emails from U.S. State Department accounts after breaching Microsoft's cloud-based Exchange email platform in May.
- Sergiu Gatlan
- September 28, 2023
- 04:45 PM
- 8
Microsoft to start retiring Exchange Web Services in October 2026

Microsoft said today that the Exchange Web Services (EWS) API for Exchange Online and Office 365 will be retired in approximately three years.
- Sergiu Gatlan
- September 19, 2023
- 12:28 PM
- 0
Stolen Microsoft key offered widespread access to Microsoft cloud services

The Microsoft consumer signing key stolen by Storm-0558 Chinese hackers provided them with access far beyond the Exchange Online and Outlook.com accounts that Redmond said were compromised, according to Wiz security researchers.
- Sergiu Gatlan
- July 21, 2023
- 05:08 PM
- 0
Microsoft Exchange Online hit by new outage blocking emails

Microsoft is investigating an ongoing Exchange Online outage preventing customers from sending emails and triggering 503 errors on affected systems.
- Sergiu Gatlan
- July 18, 2023
- 05:06 AM
- 0
Microsoft still unsure how hackers stole Azure AD signing key

Microsoft says it still doesn't know how Chinese hackers stole an inactive Microsoft account (MSA) consumer signing key used to breach the Exchange Online and Azure AD accounts of two dozen organizations, including government agencies.
- Sergiu Gatlan
- July 14, 2023
- 04:18 PM
- 4
Microsoft: Chinese hackers breached US govt Exchange email accounts

A Chinese hacking group has breached the email accounts of more than two dozen organizations worldwide, including U.S. and Western European government agencies, according to Microsoft.
- Sergiu Gatlan
- July 12, 2023
- 08:51 AM
- 2
New Microsoft 365 outage causes Exchange Online connectivity issues

Microsoft is investigating ongoing Microsoft 365 issues preventing some Exchange Online customers from accessing their mailboxes.
- Sergiu Gatlan
- April 25, 2023
- 04:47 PM
- 2
Microsoft 365 search outage affects Outlook, Teams, and SharePoint

Microsoft is investigating an ongoing issue preventing some customers from using the search functionality across multiple Microsoft 365 services.
- Sergiu Gatlan
- April 24, 2023
- 07:47 AM
- 1
Microsoft delays Exchange Online CARs deprecation until 2024

Microsoft announced today that Client Access Rules (CARs) deprecation in Exchange Online will be delayed by one year until September 2024.
- Sergiu Gatlan
- April 08, 2023
- 10:05 AM
- 0
Exchange Online to block emails from vulnerable on-prem servers

Microsoft is introducing a new Exchange Online security feature that will automatically start throttling and eventually block all emails sent from "persistently vulnerable Exchange servers" 90 days after the admins are pinged to secure them.
- Sergiu Gatlan
- March 27, 2023
- 05:43 PM
- 2
Microsoft Exchange Online outage blocks access to mailboxes worldwide

Microsoft is investigating an ongoing outage that is blocking Exchange Online customers worldwide from accessing their mailboxes via any connection method or sending/receiving emails.
- Sergiu Gatlan
- March 01, 2023
- 02:02 PM
- 1
Massive Microsoft 365 outage caused by WAN router IP change

Microsoft says this week's five-hour-long Microsoft 365 worldwide outage was caused by a router IP address change that led to packet forwarding issues between all other routers in its Wide Area Network (WAN).
- Sergiu Gatlan
- January 27, 2023
- 03:32 PM
- 0
Microsoft 365 outage takes down Teams, Exchange Online, Outlook

Microsoft is investigating an ongoing outage impacting multiple Microsoft 365 services after customers have reported experiencing connection issues.
- Sergiu Gatlan
- January 25, 2023
- 04:11 AM
- 0
Microsoft will turn off Exchange Online basic auth in January

Microsoft warned today that it will permanently turn off Exchange Online basic authentication starting early January 2023 to improve security.
- Sergiu Gatlan
- December 20, 2022
- 03:22 PM
- 1