exchange online

Microsoft confirmed a regional outage that left Outlook and Exchange Online users in North America struggling with login failures, server-connection errors and delayed mail delivery, then rolled back changes and applied optimizations to restore service — while choosing not to publish full...

Microsoft is taking the first concrete step in its phased enforcement of the dedicated Exchange hybrid app requirement: on September 16, 2025 at 07:00 UTC Microsoft will temporarily block Exchange Web Services (EWS) traffic that uses the Exchange Online shared service principal for hybrid...

Microsoft has switched on Microsoft 365 data-residency controls in Austria, bringing both the Microsoft 365 Advanced Data Residency (ADR) add‑on and Multi‑Geo capabilities to commercial customers in the country and pairing those controls with a newly opened local cloud region that Microsoft says...

Microsoft has pushed the refreshed Message Trace for Exchange Online out of preview and into general availability for worldwide (WW) tenants, triggering a hard look at automation, reporting integrations, and long-running scripts that rely on the legacy m-tracing stack; admins must plan now...

Microsoft’s new cloud-managed remote mailbox capability finally gives hybrid organizations a supported, auditable path to stop running an on‑premises Exchange server purely for recipient management — and it changes the rules for how Exchange attributes are governed in hybrid environments. The...

Microsoft is moving to strictly limit outbound email sent from the shared .onmicrosoft.com tenant namespace — commonly called MOERA (Microsoft Online Email Routing Address) — introducing a hard cap that will throttle messages sent from onmicrosoft.com addresses to 100 external recipients per...

Microsoft’s Exchange team has taken a decisive step toward finally letting organizations retire the last Exchange server in hybrid environments by adding cloud-managed remote mailbox support — a per-mailbox “flip-the-switch” that transfers Exchange attribute authority to Exchange Online while...

Microsoft is imposing a hard cap on outbound email sent from the shared onmicrosoft.com tenant namespace: mail from MOERA (Microsoft Online Email Routing Address) domains will be throttled to 100 external recipients per organization in any 24‑hour rolling window, with attempts beyond that...

Microsoft has moved the revamped Message Trace experience in Exchange Online out of preview and into general availability, bringing a faster UI, new PowerShell cmdlets, extended query windows, and new operational constraints that will change how administrators automate and extract trace data...

Microsoft’s Exchange team has announced a sweeping, tenant-level restriction that will limit outbound email sent from the shared onmicrosoft.com namespace (MOERA — Microsoft Online Email Routing Address) to 100 external recipients per organization per 24‑hour rolling window, and the change comes...

Microsoft has acknowledged and begun rolling out a fix for a troubling Exchange Online regression that left some Outlook mobile users unable to send or receive mail — a problem traced to Hybrid Modern Authentication (HMA) and tracked inside the Microsoft 365 Admin Center as incident EX1137017...

Microsoft has given a clear ultimatum to organizations still using the shared .onmicrosoft.com sending address: migrate to a verified custom domain or expect severe outbound throttling that will constrain external email to just 100 external recipients per organization in any 24‑hour rolling...

Microsoft is imposing a hard limit on outgoing email from free “.onmicrosoft.com” (MOERA) tenant domains to combat widespread abuse and protect delivery for legitimate Microsoft 365 customers, and the change — which takes effect in staged waves starting October 15, 2025 for trials — restricts...

I am using Win 11 with Office 365 at home. Yes everything is up to date with the latest everything. Let me repeat...everything is up to date. Here is the issue. First I use the snipping tool to capture and image, then paste that image into a new email I'm writing. It works fine. However...

Microsoft’s August 2025 hotfixes for Skype for Business Server introduce a security-first change that will force organizations with hybrid deployments to act quickly: a new, customer-managed Dedicated Hybrid Application model replaces the long-standing Microsoft-managed shared service principal...

A new wave of cybersecurity urgency is sweeping through IT departments as the Cybersecurity and Infrastructure Security Agency (CISA) issues a fresh, high-severity warning concerning Microsoft Exchange Server. The alert, centered around CVE-2025-53786, underscores a newly disclosed vulnerability...

A critical security vulnerability, identified as CVE-2025-53786, has been discovered in hybrid deployments of Microsoft Exchange Server. This flaw allows attackers with local administrative access to escalate their privileges within connected cloud environments, posing significant risks to...

A high-severity security vulnerability has emerged at the heart of countless enterprise communications: Microsoft has issued a warning about a flaw in hybrid Exchange Server deployments that could give cyber attackers undetected escalated access to Exchange Online—potentially undermining the...

A high-severity vulnerability, designated CVE-2025-53786, has sent urgent ripples through the IT and cybersecurity communities as organizations relying on Microsoft’s hybrid Exchange deployments face a new vector for privilege escalation and potential domain-wide compromise. Microsoft has...

Microsoft has announced a significant policy change affecting organizations using legacy versions of Exchange Server. Starting October 1, 2025, the company will block native public folder migrations from Exchange Server 2010 and earlier to Exchange Online. This move is part of Microsoft's...