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Microsoft Announces Tenant-Level External Recipient Rate Limit for Exchange Online

In an announcement that will surprise many, Microsoft announced the introduction of a tenant-wide external recipient rate limit for Exchange Online tenants to roll out starting on March 3, 2025. The new limit is designed to stop bad actors using Exchange Online as a spam platform. Microsoft says that its telemetry indicates that the new TERRL will not impact many tenants, but that fact is worth checking for any organization.

February 24, 2025

Practical PowerShell: Parameter Input Validation

In previous Practical PowerShell articles, Michel discussed using parameters in advanced functions and utilizing dynamic parameters. In this article, we will dive in a bit deeper on a topic we touched on lightly in those articles, which is ways to validate parameter input.

February 18, 2025

Protecting Exchange Server with TLS 1.3

Transport Layer Security (TLS) is used to setup secure connections between clients and servers. In this blog, we review TLS 1.3, its changes and advantages, and compare it to its predecessor, TLS 1.2.

February 17, 2025

Practical Teams: Teams Premium Administration and Licensing Guidance

When at least one user has a Teams Premium license assigned within an organization, several new features and settings are activated. In this article, we provide guidance to Teams administrators on which settings to monitor, features that are enabled by default or require specific configurations to work, and help identify who needs a Teams Premium license to access and use these various features.

February 4, 2025

Will Copilot Agents Run Amok in Microsoft 365 Tenants?

Everyone's very excited about the potential goodness of Copilot agents, but how Microsoft 365 tenants will manage potentially thousands of agents in the future is something that isn't clear. Some administrative capabilities are in the Microsoft 365 admin center, but are these sufficient? We don't think so, and this article explains why and what we'd do about the problem.

February 3, 2025