Exchange Online
The latest Exchange Online coverage — news, analysis, and updates from the WindowsNews.AI desk.
Exchange ActiveSync CBA Routing Changes: TLS 1.3 Security Implications Explained
Microsoft is implementing significant changes to how Exchange ActiveSync Certificate-Based Authentication (CBA) traffic is routed, moving toward dedicated regional endpoints that will fundamentally...
Microsoft 365 Outage Exposes Cloud Vulnerabilities and Change Management Challenges
On a busy Monday in late November, thousands of Microsoft 365 users worldwide experienced significant disruptions as critical productivity services including Outlook, Exchange Online, and Microsoft...
Exchange Online Auto-Archiving: Microsoft's Solution to Mailbox Full Errors
Microsoft is rolling out a significant enhancement to Exchange Online that promises to dramatically reduce the frequency of "mailbox full" errors that have plagued users and administrators for years....
Exchange Online Auto-Archiving: Microsoft's 90% Quota Solution Explained
Microsoft is revolutionizing email management with the introduction of Auto-Archiving for Exchange Online, a threshold-driven feature designed to automatically move older items to archive mailboxes...
Exchange Online Contact Management Updates: What Admins Need to Know
Microsoft has announced significant updates to the Get-Contact and Set-Contact PowerShell cmdlets in Exchange Online, marking a pivotal shift in how administrators manage non-mail contacts within...
Doha IX: Qatar's New Internet Exchange Revolutionizes Cloud Connectivity
The digital landscape in Qatar is undergoing a significant transformation with the launch of Doha IX, a carrier-neutral Internet Exchange Point (IXP) developed through a strategic partnership between...
Outlook Outage Timeline: How Microsoft Restored Service After 14-Hour Exchange Online Failure
Microsoft engineers have restored the majority of degraded infrastructure after a 14-hour Outlook and Exchange Online outage that left North American users locked out of email, calendars, and...
48-Hour Exchange Hybrid Free/Busy Blackout Hits Unprepared Tenants September 16
At 07:00 UTC on September 16, 2025, Microsoft will flip a switch that breaks free/busy lookups, MailTips, and profile picture sharing between on-premises Exchange and Exchange Online for any hybrid...
Microsoft Activates Austrian Data Residency: Copilot, Teams, and Exchange Now Stored Locally
Microsoft has flipped the switch on a trio of data-residency controls for its Austrian commercial customers, pairing the long-awaited Microsoft 365 Advanced Data Residency (ADR) add-on and Multi-Geo...
Microsoft’s IsExchangeCloudManaged Feature Finally Retires the Last Exchange Server in Hybrid
Hybrid organizations that kept an on-premises Exchange server solely for recipient management can finally decommission that long-standing dependency. Microsoft has released a new capability that...
Exchange Online's New Message Trace Hits GA, Legacy Tools Deprecated September 2025
Microsoft has moved the overhauled Message Trace experience in Exchange Online to general availability, bringing a faster UI, new PowerShell cmdlets, and a firm September 1, 2025 deadline for the...
Microsoft Slaps 100-Recipient Daily Limit on onmicrosoft.com Outbound Email to Thwart Spammers
Microsoft is pulling the plug on unrestricted outbound email from its shared onmicrosoft.com domains, imposing a hard cap of just 100 external recipients per tenant every 24 hours. The change,...