Patch Tuesday is easier when you review it the same way every month. This is a repeatable checklist for admins who support roughly 10 to 200 users. It is about the process, not about any particular month's updates, and it does not verify or deploy anything for you. Sources checked 10 November 2026.
1. Start with the source that fits the change
- Security updates: Microsoft's Security Update Guide. It is a JavaScript application, so if it does not load in your environment, use Microsoft's linked security update pages and search by product and update.
- Windows Server and Windows: Windows Server release information and Windows release health for release history, known issues and resolved issues.
- Microsoft 365 service changes: the Message Center. A cloud service change may need an owner or a configuration review rather than a server patch window, so keep it out of the same deployment queue.
2. Keep one digest row per relevant change
Use a table like this and add a source URL and a checked date to every row:
| What changed | Exploited or publicly disclosed? | Systems affected | Test ring | Deploy date | Rollback or recovery | Owner | Status |
|---|---|---|---|---|---|---|---|
| Update or service notice, product and version | What the Microsoft source says; write "not stated" if absent | Hosts, services or users in scope | Pilot group and checks | Your chosen window | Tested recovery route and stop condition | Decision owner | Review, pilot, scheduled, paused or complete |
If the Microsoft notice does not establish whether an issue is exploited or publicly disclosed, write "not stated" and investigate. Do not turn a missing statement into a claim that there is no risk.
3. Read severity and exploitability separately
Microsoft's severity rating system describes the potential impact if a vulnerability is exploited. Its Exploitability Index is a separate assessment of how likely exploitation is. Note what Microsoft says, then weigh your own affected systems, their role, exposure, existing controls and maintenance window. Severity alone is not a complete local priority score.
4. Use rings, with a schedule you choose
- Pilot: a small group that represents your important applications and configurations.
- Broad group: expand only after the owner reviews the pilot results.
- Critical servers: schedule separately, with an explicit change window, owner and recovery path.
Microsoft's WSUS guidance describes using computer groups to control rollout. The three-part pattern is a practical recommendation, not a Microsoft schedule. Choose the gap between stages from your maintenance windows, monitoring and recovery options. No fixed number of days fits every environment.
Before the pilot, write down what "working" means for the services in scope (startup, authentication, backups, application health, network paths, scheduled work), and who can stop the rollout.
5. If an update causes a problem
Pause the next rollout. Record the product, build, update identifier, time, symptoms, scope and the checks already done. Compare with Microsoft's current release-health information, involve the service owner, and follow the recovery process you tested for that system. Do not assume every update can be removed; it depends on the product, the update and the system state.
6. Close the loop
At the end of each cycle record the decision, approver, date, systems included, exceptions, evidence and next action. If something was deferred, record why and when the decision comes back for review.
If you want a reminder for the recurring review date, I built a free Patch Tuesday calendar. It is a planning aid and does not inspect or install updates. The full version of this guide, with FAQ and sources, is on our blog: https://www.cloudekhosting.com/blog/patch-tuesday-checklist-small-it-teams.html
