exchange online

Microsoft quietly backed away from a planned per‑mailbox external recipient cap for Exchange Online after sustained customer pushback, saying the proposed Mailbox External Recipient Rate Limit (often described as a 2,000‑external‑recipients per mailbox in a 24‑hour sliding window policy) will...

Microsoft has quietly abandoned the planned per‑mailbox Mailbox External Recipient Rate Limit (commonly discussed as the 2,000‑recipient ERR/MERRL cap) after customers warned the rule would break legitimate workflows and integrations, and the Exchange team says it will pursue smarter, more...

Microsoft’s Exchange team has announced — through a brief posting that has circulated among administrators — that the planned Mailbox External Recipient Rate Limit (MERRL, also called the Mailbox External Recipient Rate) is being canceled “indefinitely” after customer feedback, and that Exchange...

Starting March 1, 2026, Exchange Online will refuse connections from mobile devices that speak an Exchange ActiveSync (EAS) protocol older than EAS 16.1, a change announced by the Exchange Team that impacts native mail clients on phones and tablets and gives organizations a clear deadline to...

Retention support for inactive mailboxes is now available in Public Cloud, and administrators have a new, consolidated PowerShell option—Set-Mailbox -ExcludeFromAllHolds—to remove most retention holds from inactive mailboxes in a single operation while preserving legal and restrictive holds...

Microsoft's Exchange Team announced an immediate policy change that will start blocking Exchange Web Services (EWS) access for mailboxes licensed only with frontline/Kiosk plans beginning March 1, 2026, and reiterated the broader EWS retirement timetable that culminates with Exchange Online...

Microsoft’s recent clarifications around Direct Send and the related protection options in Exchange Online change the way administrators should think about mail routing, tenant exposure, and the controls available to prevent spoofing and unwanted anonymous mail that appears to originate from...

FlexNetworks has doubled its capacity into the MICE Internet Exchange (MICE), a strategic upgrade the Saskatoon‑based fibre operator says will give Central Canadian businesses and residents a more direct, lower‑latency on‑ramp to major cloud and content platforms including Microsoft Azure...

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...

Ooredoo and DE‑CIX have taken a major step toward reshaping Qatar’s internet fabric by bringing Doha IX to market — a carrier‑neutral, commercial Internet Exchange Point (IXP) that promises lower latency, direct cloud peering, and a consolidated route to global content for networks across the...

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...