Category: Exchange Online

Cat Links Exchange Online, Graph API, Microsoft 365, PowerShell

Convert mailbox folder identifiers non-interactively

Posted on Vasil Michev

In a previous article, we discussed how to convert Exchange folderIds (as returned by the Get-MailboxFolderStatistics cmdlet) to the RestId identifiers employed by the Graph API. Here, we present a version of the script that can run non-interactively and has no PowerShell module dependencies. In addition, we present a purely Graph-based version to generate mailbox folder identifiers without any Exchange methods/cmdlets.
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Cat Links Exchange Online, Microsoft 365, Office 365, PowerShell

Primer: Use Invoke-ChangeMeetingOrganizer to bulk change meeting organizer in Exchange Online

Posted on Vasil Michev

In a previous article, we covered how the newly introduced Invoke-ChangeMeetingOrganizer cmdlet can be used to change a meeting’s organizer in Exchange Online. While the cmdlet does handle recurring meetings, it can only update one (master) meeting at a time, making the realistic “transfer all meetings from user X” scenario …

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Cat Links Exchange Online, Outlook, OWA, PowerShell

How to use the Invoke-ChangeMeetingOrganizer cmdlet to change the meeting organizer

Posted on Vasil Michev

Microsoft is rolling out one of the coolest “quality of life” improvements we have received in a while. In this article, we explain how you can use the Invoke-ChangeMeetingOrganizer cmdlet to change a meeting’s organizer, as well as how some of the inner workings of the feature look like. Being able to change the organizer of (future) meetings is something that most organizations will greatly appreciate, even though not all possible scenarios can be addressed currently. …

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Cat Links Exchange Online, Microsoft 365, Office 365

PSA: Duplicate Dynamic Distribution Group detection in Exchange Online

Posted on Vasil Michev

This one will probably be of value to few Microsoft 365 tenants only, but it is on my to do list, so here goes. In June 2026, the MC1420903 message center post informed us about upcoming changes to Dynamic Distribution Group (DDGs) provisioning in Exchange Online. The changes aim to …

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Cat Links Exchange Online, Graph API, Microsoft 365

Converting Get-MailboxFolderStatistics ids for use with the Graph API

Posted on Vasil Michev

In this article, we discuss how to convert Exchange folderIds (as returned by the Get-MailboxFolderStatistics cmdlet) to the RestId identifiers employed by the Graph API. Some additional use cases of the various Exchange identifiers are addressed as well. The accompanying script can be used to generate a report of all folders within a given mailbox, even those not accessible by the end user, along with their corresponding Ids. …

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