Windows 2020?

It’s hard to believe we’ve had 10 years of Windows….however, with the Internet/IT year being 3 months this decade in fact spans 40 years… Windows passed into the new millennium and adulthood in 1999 with Windows 2000, from 1996 we’d had Windows NT 4.0 and 3.51/3.5/3.1 before that of course as well as Windows 2.0/3.0/3.1/3.11…

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Optimizing DFS Referrals: SiteCostedReferrals and PreferLogonDC

In a multi-site infrastructure you would under most circumstances want to make sure that the client is accessing Sysvol and Netlogon from a local DC, typically the logon server – or failing that to use the closest DC as determined by the replication costs defined on the site links in AD Sites & Services. Two…

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The story of the Mysteriously Malfunctioning Mail Router (AKA EDNS and Exchange Escapedes)

A small anecdote to illustrate how external changes outside of the control of the local Administrators can adversely affect the internal infrastructure: A colleague of mine in the Exchange team came to me with an issue where the customers Exchange server suddenly stopped being able to route incoming mail for a specific domain. All other…

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Fun with LDIFDE and MS09-056

The LDIFDE export tool that has shipped with all flavors of Windows since Windows 2000 is one of the more useful tools that can be used for troubleshooting. A fraction of the things you can do with it include: conditional exporting of data from Active Directory bulk modifying specific attributes testing ACL’s through running LDIFDE…

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Troubleshooting autoenrollment

From my colleague Maria in the Domains team – a collection of useful bits for troubleshooting autoenrollment issues: On a Windows Server 2003-based or Windows XP-based computer, you cannot obtain certificates from a Windows Server 2008-based certification authority (CA). This issue can occur if the CA is configured to use SHA2 256 encryption or higher…

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