Guides
Step-by-step how-tos for the IT jobs that come up again and again: email authentication, DNS, Microsoft 365 and Windows, plus the odd game fix. Each one is written to be followed start to finish, with the checks to prove it worked.
Latest guideHow to set up DMARCGo from p=none to p=reject without blocking your own invoices, newsletters or contact forms.Read the guide →All guides
- Enable DKIM in Microsoft 365Add the two CNAME records, switch on signing in Defender and prove real mail is signed.
- DNS security checkNine misconfigurations to look for, from dangling CNAMEs to exposed servers and weak CAA records.
- Windows 11 end of support datesWhen each Windows 11 version stops getting updates, and how to upgrade with one restart.
- Command & Conquer Generals full screenMake the game fill a modern screen by setting your resolution in its options.ini file.
- Out of office replies with PowerShellTurn on, schedule and turn off automatic replies for one mailbox or many.
- Force an Entra Connect syncRun a delta or full sync with Start-ADSyncSyncCycle and check the scheduler.
- Run SFC from the recovery environmentRepair Windows system files when Windows won’t start, from the recovery Command Prompt.
- IIS redirect to https and wwwA web.config rule that sends every request to https://www with a permanent redirect.
- Connect to Exchange Online PowerShellInstall the Exchange Online module and connect with MFA, now the old method has gone.