Find articles about configuring and administering Exchange Online for Microsoft 365.
A reader wants to remove all calendar items over a certain age. Compliance purge actions seem like a good way to do this, but there's a problem that needs to be fixed. eDiscovery purges can do the job, but only if you have eDiscovery Premium. And then there's Graph APIs to consider. All in all, many ways exist to purge calendar items.
Calendar events make up user and group calendars. It's possible to create, update, cancel, and remove calendar appointments and meetings, including recurring events, through the Graph API. This article explains how to pass all the properties needed to create and manage events using PowerShell and the Graph APIs.
A surprise announcement brings the news that the Exchange Online High Volume Email (HVE) solution will only deliver messages to internal recipients from June 2025. Azure ECS is now the sole offering for sending large volumes of email to external recipients. On the upside, HVE will support basic authentication until September 2028 to give tenants the chance to upgrade devices and apps.
In this article, Mezba Uddin reviews using Audit Logs and the Graph API to performs six specific investigation actions in Exchange Online to help keep your email environment safe.
Previously, the Graph APIs limited Outlook attachments to a maximum of 3 MB. That limit doesn't exist anymore, but the old method of uploading very large attachments in chunks to make sure that the operation is possible across flaky networks is still useful, so we explain how to do it here using the Microsoft Graph PowerShell SDK.
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.
In this episode of Practical Protection, Paul Robichaux dives into CISA's Microsoft Expanded Cloud Logs Implementation Playbook, its prerequisites, and applying this advice into your organization.
Microsoft announced the Retirement of EWS in Exchange Online a while ago. That means any scripts or applications you have written should be reviewed and rewritten to use Microsoft Graph. In this blog, we review an example of moving from EWS to the Graph while handling date values.
It's time to check recipient filters for dynamic distribution groups to ensure that you don't have any wildcard prefixes used with the -eq operator to find recipients based on their email addresses. A November 30 update will stop this kind of recipient filter from working and might have a knock-on effect on other processes.
Three years ago, we described how to create organizational contacts in user mailboxes with Graph API requests. In this iteration, we read the contacts from a Microsoft list and use Microsoft Graph PowerShell SDK cmdlets to update user mailboxes. The techniques explained in the article can be used in many scenarios.
Microsoft released the initial implementation of a cloud-based message recall feature last year. Now they're back with a set of enhancements to take the rough edges off, like explaining to users why messages disappear from the inbox and enabling support for external services like email hygiene and mail autosignature providers.
If you're looking for an email service capable of handling large volumes of email to external recipients, Microsoft will propose Email Communication Services (ECS). Built on top of Exchange Online, ECS shares some characteristics with the High Volume Email (HVE) solution. After testing both, HVE is probably a better solution if you have a Microsoft 365 tenant.
