exchange online

Microsoft has acknowledged and begun to address a disruptive bug that in some instances prevents the classic Outlook for Windows from launching — an error that leaves affected Microsoft 365 users locked out of the desktop client — but its official guidance still lists Outlook Web Access (OWA)...

Cloud‑managed remote mailboxes are now being promoted from preview into production-ready use, delivering the long‑promised ability to manage Exchange‑specific attributes for directory‑synced mailboxes directly in the cloud and removing one of the most common reasons organizations kept a “last...

Microsoft has stopped issuing support, security fixes, bug patches and time‑zone updates for Exchange Server 2016 and Exchange Server 2019 as of October 14, 2025, and organizations that continue to run these on‑premises versions now face a materially higher security, compliance, and operational...

Microsoft is routing Exchange ActiveSync Certificate‑Based Authentication (CBA) traffic to new, dedicated CBA endpoints by cloud region — a seemingly small change with important operational and security consequences for any organization that terminates, inspects, or filters ActiveSync traffic at...

On a busy Monday in late November, thousands of Microsoft 365 users worldwide found critical pieces of their productivity stack—Outlook, Exchange Online, and Microsoft Teams—either sluggish or unusable, triggering a fast-moving outage that exposed the resilience limits of cloud-first workflows...

Microsoft is rolling out a built-in safety valve for Exchange Online that aims to make the dreaded "mailbox full" error far less common: a new threshold-based auto‑archiving mechanism will automatically relocate the oldest eligible items from a mailbox to its archive once the primary mailbox...

Microsoft is introducing an automatic, threshold-driven archiving feature for Exchange Online — Auto-Archiving — that will begin rolling out to public clouds on October 15, 2025 and to government clouds the following month; when enabled for a mailbox that already has an archive provisioned, the...

Headline Updates to Get-Contact and Set-Contact in Exchange Online — What admins must know (announcement, impact, detection, remediation, and migration guidance) Summary (TL;DR) Microsoft announced on Oct 7, 2025 that Exchange Online will stop returning or allowing management of Contact...

Microsoft and the European Commission have reached a binding settlement that will reshape how Microsoft 365, Office 365, and Microsoft Teams are sold and integrated across Europe — and, in practice, globally — by enforcing unbundling, minimum price deltas, expanded interoperability APIs, and...

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 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 message-tracing stack; admins must plan now...

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...