INTUNE
7 min ↗
Resolve duplicate Intune device records
Identify the authoritative hybrid-joined record and retire stale registrations without breaking the working device.
The Chris Brewer / Knowledge Base
Infrastructure Notes
Practical runbooks and field notes for systems administration.
Reference library
All notes
6 notes
POWERSHELL
4 min ↗
Update a scheduled task that uses a gMSA
Modify an existing task action without knowing—or needing—the managed service account password.
EXCHANGE
8 min ↗
Rotate an Exchange certificate safely
Issue a certificate, enable services, update connector identity, and validate mail flow before cleanup.
NETWORKING
6 min ↗
Delegate ACME DNS-01 validation
Separate certificate validation records from production DNS with CNAME delegation and tightly scoped API access.
ACTIVE DIRECTORY
5 min ↗
Connect a workgroup server to WSUS
Configure required registry policy, choose notification behavior, and verify client reporting.
MICROSOFT 365
6 min ↗
Troubleshoot delayed Teams provisioning
Distinguish licensing success from service-side provisioning before recreating a user.