Cat Links Exchange Online, Microsoft 365, Office 365, PowerShell

Unable to reset the SharingPermissionFlags flag when using Set-MailboxFolderPermission

Posted on Vasil Michev

In case you are running into issues with the Set-MailboxFolderPermission seemingly being unable to reset the value for the SharingPermissionFlags parameter, this article explains the “why”. In terms of solutions, there aren’t any good ones, as they all require you to perform additional (manual) actions. Hopefully the different teams within Microsoft will align at some point and allow us to manage delegates in a unified manner! …

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Cat Links SharePoint Online, Microsoft 365, PowerShell

SharePoint Online PowerShell module adds support for certificate-based authentication

Posted on Vasil Michev

In a welcome, albeit long-awaited, development, Microsoft has finally added support for certificate-based authentication (or CBA) for the SharePoint Online PowerShell module. The news was published as part of the MC1188595 message center post, which unfortunately is a bit light on the details. So let me fill in the gaps …

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Cat Links Exchange Online, Microsoft 365, PowerShell

All you need to know about Exchange Online Admin API (or how to run cmdlets without PowerShell) – part 2

Posted on Vasil Michev

In this article, we try to summarize all the information you’d need in order to work with the Exchange Online Admin API. We cover the prerequisites, authentication, how to use any of the built-in cmdlets, as well as many “hidden gems”. The details you’ll find in this article enable you to perform almost all Exchange Online related operations without the need to even touch PowerShell. Keep in mind that anything we discuss here is not supported and in most cases, not even documented, so use at your own risk! …

Continue readingAll you need to know about Exchange Online Admin API (or how to run cmdlets without PowerShell) – part 2

Cat Links Exchange Online, Microsoft 365, PowerShell, Uncategorized

All you need to know about Exchange Online Admin API (or how to run cmdlets without PowerShell)

Posted on Vasil Michev

In this article, we try to summarize all the information you’d need in order to work with the Exchange Online Admin API. We cover the prerequisites, authentication, how to use any of the built-in cmdlets, as well as many “hidden gems”. The details you’ll find in this article enable you to perform almost all Exchange Online related operations without the need to even touch PowerShell. Keep in mind that anything we discuss here is not supported and in most cases, not even documented, so use at your own risk! …

Continue readingAll you need to know about Exchange Online Admin API (or how to run cmdlets without PowerShell)

Cat Links Exchange Online, Microsoft 365, Office 365

Quick look at the new Exchange Admin API additions

Posted on Vasil Michev

Microsoft has been telling us for years that it plans to deprecate the EWS API, yet has been very slow in addressing the gaps such deprecation would leave with the Graph API. With the October 2026 deadline approaching, we are finally seeing efforts to bridge said gaps, one of which …

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