Category Archives: KnowledgeBase Articles
From the field: You receive error ‘AADSTS9090561 The endpoint only accepts POST requests. Received a GET request’ when signing in
Sometimes, you hit error messages that are just too vague to troubleshoot. I like these kinds of situations. I’ve hit errors before and their origins were always interesting. Let’s see what’s happening today causing the error ‘AADSTS9090561 The endpoint only accepts POST requests. Received a GET request’ when signing in. The situation An organization is […]
KnowledgeBase: You receive error 'AuthorizationManager check failed' when importing Synchronization Settings in Azure AD Connect
Sometimes, the installation of Azure AD Connect can mess up your project deadlines in mere seconds. In this blogpost, I want to share an error that kept the admins of an organization occupied for quite some time, while it was relatively easy to fix. The situation An organization wants to perform an Azure AD […]
KnowledgeBase: You experience errors with Event ID 14 and source Kerberos-Key-Distribution-Center on Domain Controllers
To continually increase the information security of on-premises Domain Controllers, Microsoft provides new functionality to Windows Server and Active Directory. Sometimes, the new security measures affect the efforts of admins to get their Active Directory environments to a safer state, ahead of the curve. In this knowledgebase article, I’ll discuss such a measure. The […]
KnowledgeBase: You experience errors with Event ID 42 and source Kdcsvc on Domain Controllers
To continually increase the information security of on-premises Domain Controllers, Microsoft provides new functionality to Windows Server and Active Directory. Sometimes, the new security measures affect backward compatibility. In this knowledgebase article, I’ll discuss such a measure. The situation You run Active Directory with Domain Controllers on one or more of the below Windows Server […]
KnowledgeBase: You experience Errors with EventID 33007 and 33008 when people try to use Azure AD Self-service Password Reset
Azure AD Connect can configure a lot of the requirements it needs automatically. One of the things it can configure for you is the AD Connector account, the account that is used to read and write into Active Directory. However, Azure AD Connect also provides PowerShell cmdlets to configure and secure AD Connector accounts of […]
KnowledgeBase: Colleagues receive ‘We cannot create a self-service Azure AD account for you because domain.tld has disabled self-service account sign-up by email validation. Ask domain.tld's admin to enable EmailVerified users or create an account for you.’ when they try to redeem an Azure AD B2B invitation
Sometimes, error codes for Microsoft products and technologies are really straightforward. Especially in situations where you have limited to no troubleshooting options, like in Azure Active Directory (Azure AD), this might prove difficult to solve. Today, let’s look at an error your colleagues might encounter with default Azure AD settings in the context of Azure […]
KnowledgeBase: You receive EventID 16990 or 16991 when users create or modify computer objects
One of the more recent issues you might encounter, when you create or modify computer objects and/or (group) managed service accounts in Active Directory is errors on your domain controllers with event ID 16990 or 16991 with source Directory-Services-SAM in the System event log. The situation You run an Active Directory forest with Domain Controllers […]
KnowledgeBase: In-placing upgrading Windows Server for an Azure AD Connect installation is not supported
With the release of Azure AD Connect v2, many Hybrid Identity admins find themselves with Windows Server 2012 and Windows Server 2012 R2 installations with Azure AD Connect v1 installations. As Azure AD Connect v2 does not support installation on these Operating Systems, Microsoft urges these admins to perform an Azure AD Connect swing migration. […]
KnowledgeBase: You experience ‘You can't access this shared folder because your organization's security policies block unauthenticated guest access’ errors after applying the May 2021 Cumulative Update
Troubleshooting IT problems is hard. Troubleshooting problems that arise on end-user devices around the same time as these devices automatically update should be simpler, but can be just as hard. Today, let’s talk about some behavior we’re seeing at some organizations surrounding the May 2021 Cumulative Update for Windows 10. The situation Within the organization, […]
Knowledgebase: Azure AD Connect Health Agents are not registered on Azure AD Connect installations running version 1.6.2.4
Version 1.6.2.4 of Azure AD Connect that was released just last week seems to have an issue with the Azure AD Connect Health agent. The situation You intend to synchronize objects from one or more on-premises Active Directory Domain Services implementations to an Azure AD tenant. You install Azure AD Connect version 1.6.2.4 to […]
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