The Document Migration Tool for Fixing Broken Links at Scale

Every document migration — whether you are moving to SharePoint Online, renaming a server, restructuring a folder hierarchy, or replacing your NAS storage — breaks the embedded links that hold your document ecosystem together. Hyperlinks stop resolving. Excel workbooks lose their external data connections. OLE-linked objects display stale or missing data. The files themselves are fine; the references inside them are not. ReplaceMagic is the dedicated document migration tool for repairing those references in bulk, across every Office file type, without opening a single document.

Why Every Document Migration Breaks Links

Office documents do not store links as relative references the way web pages do. They store absolute paths — the full address of the target file at the moment the link was created. Those addresses take one of three forms depending on the storage technology in use:

• UNC paths — for example \\CorpServer\Finance\Reports\2024\Q4.xlsx, used on file servers and older SharePoint environments accessed via WebDAV or mapped drives
• Local drive paths — for example C:\Users\jsmith\Documents\Project\spec.docx, common in departmental file shares and legacy document management systems
• SharePoint URLs — for example https://intranet.company.com/sites/Projects/Shared%20Documents/spec.docx or https://company.sharepoint.com/sites/Projects/Shared%20Documents/spec.docx

When a migration changes the storage location — and every migration does — the absolute path embedded in each link is no longer valid. The document on the other end of the link has moved, but the pointer inside your file has not been updated. The only way to fix this at scale is a tool that reads the binary format of each document, locates every link reference, applies the correct path transformation, and writes the corrected file back to storage. That is precisely what ReplaceMagic does.

To put the manual alternative in perspective: a document estate of 100,000 files, each containing an average of three embedded links, represents 300,000 individual references that must be updated. At three minutes per document using a manual find-and-replace workflow, that is 5,000 person-hours — more than two years of a single employee’s working time. ReplaceMagic processes the same estate in hours.

Migration Scenarios ReplaceMagic Handles

ReplaceMagic is not limited to SharePoint migrations. It handles every migration pattern that changes document storage paths:

• File server to SharePoint Online — UNC paths replaced with SharePoint Online HTTPS URLs
• Server rename — old server name in UNC paths replaced with new server name across all documents
• Folder restructuring — path segment changes caused by departmental reorganisation or taxonomy redesign
• Network infrastructure change — domain rename, domain migration, or DNS restructuring that changes the host portion of UNC or HTTP paths
• New NAS or SAN storage — replacement of storage hardware under a new network name or address
• SharePoint on-premises to SharePoint Online — on-premises site collection URLs replaced with Microsoft 365 equivalents
• Tenant-to-tenant migration — source Microsoft 365 tenant domain replaced with destination tenant domain
• Cloud storage migration — any migration between cloud storage providers where the document URL structure changes

What Makes ReplaceMagic the Right Tool

Several characteristics distinguish ReplaceMagic from generic find-and-replace utilities and from migration tools that only move files without addressing link content:

No Documents Opened

ReplaceMagic operates directly on the file format. It reads the binary or XML structure of each Office document, locates link references within that structure, applies the transformation, and writes the corrected file. Office applications do not need to be installed. No documents are opened interactively. This is what makes processing at 250,000-document scale practical.

All Link Types in One Tool

A single ReplaceMagic run addresses every embedded link type simultaneously: hyperlinks in body text and shapes, OLE object source links, Excel external workbook references and external data connections, Power Query source paths, VBA file references, header and footer path fields, and Word field codes such as INCLUDETEXT and INCLUDEPICTURE. You do not need separate tools for different link types.

All Document Types

ReplaceMagic processes Word (.docx, .doc), Excel (.xlsx, .xlsm, .xls), PowerPoint (.pptx, .ppt), Visio (.vsdx, .vsd), Project (.mpp), OneNote (.one), PDF, plain text, and CSV files in the same workflow. One tool, one run, one audit trail.

Native SharePoint Integration

For migrations to or within SharePoint Online, ReplaceMagic connects natively via the SharePoint API. There is no need to map SharePoint as a network drive. Metadata — last-modified date, author, version history — is preserved. Check-in and check-out are managed automatically. Modern authentication (MFA, App-Only, OAuth 2.0) is fully supported.

Preview Before Committing

Before any file is modified, ReplaceMagic presents a complete list of proposed changes: the source file, the link type, the current value, and the replacement value. You review and approve. This preview step is essential for quality assurance in regulated industries and for building stakeholder confidence before a large migration run.

Enterprise Scale

Multi-threaded processing across all available CPU cores, support for document estates of 250,000 files per run, and multi-instance licensing for parallel processing of very large estates. ReplaceMagic has been deployed by organisations with multi-million document libraries.

Trusted by Global Enterprises

ReplaceMagic has been in continuous production use since 2012 — more than 12 years on the market. It is used by over 500 enterprise customers worldwide, including organisations such as Boeing, Mercedes-Benz, PepsiCo, American Express, and Vestas. These organisations chose ReplaceMagic because no other tool combines the breadth of document type support, the depth of link type coverage, and the native SharePoint Online integration required for mission-critical migration projects.

A full list of enterprise customers and case references is available on our Customers page.

Start With a Free Trial

The ReplaceMagic free trial requires no registration and imposes no time limit. Download it, point it at a representative sample of your document library — on a file server, a SharePoint library, or a local folder — and run a scan. Review the inventory of embedded links. Configure a test path mapping and run a preview. Verify the proposed changes. You will have a complete picture of what ReplaceMagic will do before you commit to a purchase.

If your migration involves complex path transformations, multiple source environments, or a very large document estate, our migration consulting team can assist with scoping, configuration, and execution.

In case of any questions please do not hesitate to contact us.