Practical IT Guides for Windows, SCCM & PowerShell Admins

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Windows and Office Activation Proxy Whitelist Websites

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We recently came across an issue where our Configuration Manager Operating System Deployments (OSD) were failing at the activating Windows step. Having spent far too much time looking into why it was doing this, we eventually found out that it was our proxy servers that were blocking access it the Microsoft activation servers.

SCCM OSD – “A required device isn’t connected or cannot be accessed”

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We today ran into an issue where our SCCM OSD PXE boot was not working. It was coming up with a very confusing message stating: “A required device isn’t connected or cannot be accessed” This led us to start looking at the hard drive and the drivers, however, the solution was completely different. The problem … Read more