Category Archives: KnowledgeBase Articles

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: 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: 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, […]
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