SharePoint File-Level Archiving Solution

Introduction

Managing storage in SharePoint Online has become a growing challenge for organizations as content continues to expand across departments, projects, and collaboration spaces. Traditionally, Microsoft provided site-level archiving, which forced IT teams to archive entire sites-even when only a portion of the content was inactive.

With the introduction of file-level archiving in Microsoft 365 Archive (Public Preview 2026), organizations now have a modern, granular, and cost-effective way to archive content based on file age while keeping active collaboration unaffected.

This article provides a detailed, practical, and customer-ready explanation of file-level archiving, including architecture, implementation approach, automation strategy, and business benefits.

The Storage Challenge: Why File-Level Archiving Matters

Organizations face:

• Rapid growth of SharePoint content
• Long-lived sites (HR, Finance, Projects)
• Mix of active and inactive files in the same library

Previously:

• Only site-level archiving was available
• Result:
  • Entire site had to be archived OR
  • Old files stayed in active storage

This led to:

• Increased storage costs
• Reduced performance
• Poor search and Copilot relevance

With file-level archiving:

• Archive only inactive files
• Keep active content available
• Optimize storage efficiently

As highlighted in the provided document , this capability enables precision-based storage management, which was not possible earlier.

What is File-Level Archiving?

File-level archiving extends Microsoft 365 Archive from the site level to individual files, allowing files within active SharePoint sites to be moved into cold storage independently. Archived files remain visible in their original document library location with a distinct archive icon overlay, maintaining user familiarity with content structure.

While archived, files are not readable and require reactivation before access, but all metadata, permissions, and version history are fully preserved throughout the archive and reactivation cycle.

Users with edit permissions can archive files directly from SharePoint sites enabled for file archiving by selecting one or more files and choosing the archive action. The feature supports folder-level actions, enabling users to archive or reactivate all files within a folder including subfolders in a single operation, with automatic email notification upon completion.

File-level archiving allows:

• Archiving individual files or folders
• Within active SharePoint sites
• Without impacting ongoing collaboration

Key Characteristics:

• Files move to cold storage tier
• Still visible in SharePoint (with archive indicator)
• Metadata, permissions, and version history preserved
• Requires reactivation before access

This ensures:

• No data loss
• No governance impact

How File-Level Archiving Works

End-to-End Flow

• Identify inactive files (e.g., older than 3 years)
• Archive files to Microsoft 365 Archive
• Files move to cold storage
• Users can restore when needed

Addressing Customer Requirements

Requirement 1: Archive files based on age

Since automatic policies are evolving (preview stage), implement:

• Power Automate OR
• PnP PowerShell / Microsoft Graph

Example logic:

• Modified Date ≤ 3 years

This enables automated lifecycle-based archiving

Requirement 2: Easy Restore for Users

• Users with read permission can restore files
• No IT dependency
• Restore behavior:
  • Recent → instant
  • Older → up to 24 hours

Requirement 3: Save SharePoint Storage

• Archived files moved to low-cost storage tier
• Up to 75% cost savings compared to SharePoint storage

Storage Cost Optimization

Storage Type	Cost	Purpose
SharePoint Online	Standard pricing	Active data
Microsoft 365 Archive	Low (~$0.05/GB)	Archived data

Key benefit:

• Charges apply only when tenant exceeds quota

File-Level vs Site-Level Archiving

Microsoft 365 Archive now offers both file-level and site-level archiving capabilities, each serving distinct use cases for IT decision makers.

• Site-level archiving works well for project-based sites that conclude all at once, moving entire sites to cold storage when all collaboration has ended.
• File-level archiving provides the precision instrument for large, long-lived sites where a handful of active files coexist with years of inactive content, enabling selective archiving without disrupting ongoing work.

The granular control of file-level archiving allows administrators to enable users to identify and archive content they are familiar with, rather than requiring administrators to make broad judgement calls about entire site relevancy.

This approach improves both Copilot and search performance by removing archived files from the active index while maintaining governance and compliance requirements.

Feature	File-Level	Site-Level
Granularity	Individual files	Entire site
User Control	Yes	No (Admin only)
Impact	Minimal	Entire site unavailable
Use Case	Long-lived sites	Completed projects

File-level archiving is ideal for:

• HR portals
• Finance systems
• Ongoing collaboration sites

Automation Strategy (Recommended)

Since policy-based archiving is not fully available yet:

Option 1: PnP PowerShell (Best for Enterprise)

• Scan all sites
• Filter files older than 3 years
• Archive using API

Option 2: Power Automate

• Scheduled flow
• Condition-based filtering
• Archive action

Governance & Control

Admins can:

• Enable/disable archive per tenant/site
• Control user permissions
• Monitor archive usage

Impact on Copilot and Search

One of the most important benefits:

• Archived files removed from active index

• Improves:

  • Search results
  • Copilot responses

Only relevant, active data is surfaced

Use Cases

File-level archiving directly addresses two critical customer needs:

1. Easy restore functionality
2. SharePoint storage savings

For storage optimization, archiving helps reduce active SharePoint storage consumption by moving inactive content to a lower-cost cold storage tier, potentially saving up to 75% compared to adding additional SharePoint storage capacity.

1. HR Department

• Archive employee records older than 5 years
• Keep current employees active

Finance

• Archive historical invoices and reports
• Maintain compliance

3. Project Sites

• Archive completed deliverables
• Keep active project files

4. Legal & Compliance

• Retain records in archive
• Restore when needed for audits

Implementation Roadmap

Phase 1: Pilot

• Enable file-level archive
• Select few sites
• Test automation

Phase 2: Scale

• Apply across tenant
• Define policies

Phase 3: Optimize

• Monitor storage savings
• Fine-tune rules

Licensing & Availability

• Available in Public Preview (March 2026)
• GA expected: July 2026
• Uses:
  • Microsoft 365 Archive
  • Syntex PAYG model

Key Benefits

• Up to 75% storage cost savings
• File-level precision
• Native Microsoft 365 integration
• Easy restore (self-service)
• Improved search & Copilot relevance
• No external storage dependency

Summary

File-level archiving in Microsoft 365 Archive is a game-changing capability for SharePoint storage management.

It enables organizations to:

• Archive files based on age
• Reduce storage costs significantly
• Provide seamless restore experience
• Maintain governance and compliance

While still in preview, it is recommended to:

• Start with a pilot implementation
• Build automation for age-based archiving
• Scale after General Availability

References

• Microsoft 365 Archive
• Microsoft Tech Community Blog (File-Level Archiving Announcement)
• End user experience in Microsoft 365 Archive
• Microsoft 365 Archive Adoption