Exchange Online

Microsoft takes a pivotal step in improving security with the introduction of a daily external recipient limit for Exchange Online customers. Starting in January 2025, the company will enforce a daily Exchange Online bulk email limit of 2,000 external participants to curb spamming and misuse of resources. The recipient rate limit is a security feature…

Microsoft has announced the public preview of a new High Volume Email (HVE) service for Microsoft 365 customers. The new offering enables commercial users to send large volumes of emails beyond the current limits of Exchange Online. Up until now, Exchange Online allowed users to send emails to a maximum of 10,000 internal recipients per…

Microsoft is set to retire the Microsoft 365 Purview eDiscovery standard search-mailbox cmdlet. The company has recently announced in a message on the Microsoft 365 Admin Center that this change will go into effect in March this year. The Search-Mailbox cmdlet is a PowerShell command that allows administrators to search for particular items in Exchange…

Exchange Online PowerShell is a command-line tool that allows you to manage your Exchange Online mailboxes and users. It can be used to perform a variety of tasks, such as creating and managing mailboxes, configuring mail flow rules, and managing user permissions. In this guide, we’ll show you how to install and connect to Exchange…

In a decisive move toward bolstering cybersecurity, Microsoft is permanently turning off Remote PowerShell Protocol (RPS) for Exchange Online this month. The company urges customers to move to the REST-based Exchange Online PowerShell version 3 module instead. Remote PowerShell Protocol (RPS) is a feature that allows IT admins to run PowerShell commands or scripts on…

Microsoft has recently sent ripples through the developer community with its announcement of the retirement of the Exchange Web Services API. The company will begin blocking EWS requests from non-Microsoft applications to Exchange Online starting in October 2026. Exchange Web Services (EWS) is a cross-platform managed API that allows developers to build custom applications that…

Microsoft recently disclosed a cyber-espionage campaign that allowed Chinese hackers to steal a signing key and breach sensitive US government email accounts. The company launched an investigation into the security incident, which led to the publication of detailed findings in a report released on Wednesday. In July, Microsoft detailed that a Chinese hacking group (tracked…

The first article in this series discussed how to remove the ability of OWA users to create autoforwarding addresses. This does a lot to stop the forwarding of email outside an organization, but OWA is only one part of the problem. We also need to deal with the other ways that messages can be automatically…

The Cyber Security Review Board (CSRB) has recently announced that it will investigate the recent compromise of Exchange Online used by the US government. The board also plans to conduct a review of the identity and authentication infrastructure used by cloud providers. Last month, Microsoft confirmed that China state-backed hackers (dubbed ‘Storm-0558’) breached the email…