As it regularly happens when you stop a test platform for a long time, computer accounts password expire and Active Directory controllers do not replicate anymore (well known item since Windows 2000 Active Directory).
When you try to manually replicate using dssite.msc, you get the error message "2148074274 The target principal name is incorrect". [More]
How to Exchange Prepare Schema with PowerShell DSC
During some automatized deployments, I had, as of [More]