> For the complete documentation index, see [llms.txt](https://docs.adaptiva.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.adaptiva.com/patch/patching-fundamentals.md).

# Patching Fundamentals

- [Business Units](https://docs.adaptiva.com/patch/patching-fundamentals/business-units.md): Overview and explanation of Business Units.
- [Business Units Using Active Directory](https://docs.adaptiva.com/patch/patching-fundamentals/business-units/business-units-ad.md): Use a sensor to create Business Units based on OU membership
- [Advanced Patching Strategies](https://docs.adaptiva.com/patch/patching-fundamentals/patch-strategies.md): Patching Strategies are the central management objects in Adaptiva because they group the details that define how, when, and where to update patches.
- [Create an Advanced Patching Strategy](https://docs.adaptiva.com/patch/patching-fundamentals/patch-strategies/patch-strategies-create.md): How to create and use an Advanced Strategy within OneSite Patch.
- [Advanced Patching Strategies settings](https://docs.adaptiva.com/patch/patching-fundamentals/patch-strategies/patch-strategies-settings.md): Additional settings for Advanced Patching Strategies within OneSite Patch.
- [Advanced Patching Strategies actions](https://docs.adaptiva.com/patch/patching-fundamentals/patch-strategies/patch-strategies-actions.md): Patch Strategy Actions options available in OneSite Patch.
- [Approval Requests](https://docs.adaptiva.com/patch/patching-fundamentals/approval-requests.md): How to approve or reject Approval requests within OneSite Patch.
- [Flex Controls](https://docs.adaptiva.com/patch/patching-fundamentals/flex-controls.md): Flex Controls work in conjunction with autonomous patching so you have more granular control over how patching is implemented.
- [Blocklisting](https://docs.adaptiva.com/patch/patching-fundamentals/flex-controls/flex-controls-blocklisting.md): Blocklisting in OneSite Patch allows you to block potentially nefarious patches that may do more harm than good.
- [Cycle Operations](https://docs.adaptiva.com/patch/patching-fundamentals/flex-controls/flex-controls-cycle-operations.md): Cycle Operations give users access to Patching, Deployment, and Rollout Cycle details and the ability to manually manage active operations.
- [Exceptions](https://docs.adaptiva.com/patch/patching-fundamentals/flex-controls/flex-controls-exceptions.md): Patching Exceptions allow teams to define exceptions for specific business units or environments, create multiple exceptions under a single policy, and more.
- [Pauses](https://docs.adaptiva.com/patch/patching-fundamentals/flex-controls/flex-controls-pauses.md): Pause settings allow you to stop patching either globally or for specific Business Units, Products, Patches, or Cycles.
- [Rollbacks](https://docs.adaptiva.com/patch/patching-fundamentals/flex-controls/flex-controls-rollbacks.md): The Rollbacks feature of OneSite Patch allows you to rollback one or more patches or releases to a previous version.
- [Requests](https://docs.adaptiva.com/patch/patching-fundamentals/flex-controls/flex-controls-scan-requests.md): Scans are performed daily at 6 AM and are load balanced over 8 hours, however, you can manually trigger a client scan of specified products with Scan Requests.
- [Understand Content Cache](https://docs.adaptiva.com/patch/patching-fundamentals/understand-client-cache.md): Learn about the Adaptiva Client Cache, a local repository for sharing content with peers.