Version history or retention policy for Microsoft 365 records?

Use SharePoint version history for accidental overwrites, and add Microsoft Purview retention when files must be retained under a defined legal or contract obligation. Use both when both needs exist. Restoring a version is a recovery action, not proof of immutable history or compliant retention. Set the retention period from the actual obligation; neither cited article supplies one for this library. Confirm the live quote, licensing, and tenant configuration before deciding. Microsoft Support · Microsoft Purview

Decision case	Design choice	Pilot evidence
Accidental overwrite	Enable library versioning; choose major versions or major and minor versions, and set a limit.	Restore an earlier version as the current file. Microsoft Support
Deliberate deletion	Add Purview retention when deleted content must remain retained.	Confirm the chosen policy or label behavior and access to the retained content. Microsoft Purview
Legal or contract retention	Define the obligation, then configure a Purview policy or label. Keep versioning on if all versions must be retained.	Confirm scope, duration, and edit and delete behavior. Microsoft Purview
Export or access testing	Treat export and later access as pilot requirements.	Demonstrate the needed path with a sample file.

How the controls divide the work

A library owner can configure whether edits create major versions only or both major and minor versions, and can limit the versions kept. That supports recovery after a mistaken edit. Restoring a prior version changes the working file; it does not establish a lasting recordkeeping rule. Pick a version limit against the team’s recovery need, and include a restoration exercise in rollout. Microsoft Support

Purview retention addresses what content must remain retained when users edit or delete files. SharePoint and OneDrive files can be retained by a policy or label. When needed, a Preservation Hold library stores copies. A standard retention label and a retention policy differ in edit and delete behavior, so check the chosen setting against the obligation. Decide which files are covered and how retained content will be accessed. To retain all versions, versioning must be on for the site. Microsoft Purview

Consider a six-person contracts team using one document library. Staff revise draft agreements, and a mistaken overwrite must be reversible. The library owner configures major and minor versions and a limit; the team checks that an earlier draft can be restored. Signed agreements have a separate contract retention requirement. The team defines it before an administrator chooses a Purview policy or label, checks its edit and delete effects, and confirms the intended files are covered. These are pilot steps, not observed tenant results.

Boundaries before rollout

Assign the library owner responsibility for version settings and identify who can configure retention. Confirm the required license and administrator configuration in the tenant; these sources do not establish what the organization has purchased or enabled. A retention policy can take up to seven days to process. Plan for that interval and inspect the resulting state afterward before declaring success or failure. Microsoft Support · Microsoft Purview

Before migration, list the versions and retained content that must remain accessible. The cited guidance does not establish what a particular migration or export preserves. Require a sample transfer and access check before treating either as an archive path. If restoration, retention after deletion, or access fails, pause rollout and correct the design.

Pilot acceptance checklist

• Record the recovery need, covered files, and approved retention obligation.
• Confirm licensing, administrator settings, and library version choices.
• Restore one earlier version after a pilot overwrite.
• Check policy or label behavior for a pilot edit and deletion after processing.
• Verify retained-content access and any required sample export or migration.
• Approve rollout when observed results match the written requirements.