Excel Performance Problems

How to Fix Slow Excel Performance with SharePoint External Links

Bushra Parveen Oct 19, 2026 868 views

Question details

Users experience significant delays when saving or opening Excel workbooks that contain multiple external links to remote SharePoint or OneDrive files.

How to Fix Slow Excel Performance with SharePoint External Links

Product: Microsoft Excel
Device & OS: not provided
Scenario: Editing, opening, or saving complex Excel workbooks connected to external remote data sources.
Observed behavior: The workbook remains responsive during normal usage, but opening and saving processes take several minutes as the application validates and syncs linked data across SharePoint and OneDrive.

Before you start

Ensure your OneDrive or SharePoint client is actively running and fully synced, and verify your internet connection is stable before making changes to your workbooks.

Solution 1Recommended

Open Source Workbooks Before Editing

Pre-loading the source files prevents Excel from repeatedly pinging the remote SharePoint server during calculations and saves, significantly improving performance.

When Excel formulas reference external files stored in the cloud, the application must establish a connection to validate and retrieve data upon saving. Opening the source files locally forces Excel to use the active open instances instead of querying the remote SharePoint directories.

Locate source files

Navigate to your SharePoint or OneDrive folder and locate the external workbooks that act as data sources for your main file.

Open source files first

Double-click to open all necessary source workbooks in Excel before opening the main destination workbook.

Open the main workbook

Launch the primary workbook that contains the external links. Perform your edits, calculations, and saves as usual. The performance should now be significantly faster.

Performance Tip: Make this a standard practice for workbooks with heavy cross-file dependencies like extensive SUMIFS or VLOOKUP formulas.

Solution 2

Configure Manual Link Updates

Changing link update settings to manual prevents Excel from attempting to refresh external data automatically upon saving or opening.

Solution 3

Consolidate Data to Reduce External References

Minimizing the number of remote references by bringing data directly into the local workbook eliminates external syncing bottlenecks.

Free Microsoft Office alternative

Experience Faster Spreadsheet Operations with WPS Office

If heavy SharePoint integrations and remote external links are causing Microsoft Excel to freeze or save slowly, consider trying WPS Office. It provides a lightweight, highly compatible spreadsheet environment that loads quickly and handles complex datasets with ease.

1. Download WPS Office: Visit the official WPS website and download the free installation package for your operating system.
2. Install the application: Run the installer and follow the quick on-screen instructions to set up WPS Office on your computer.
3. Open your workbook: Launch WPS Spreadsheets and open your .xlsx file to experience a faster, more responsive spreadsheet environment.

Highly compatible with Microsoft Office formats (.xlsx, .xls) and complex formulasLightweight architecture for noticeably faster file loading and savingFamiliar user interface ensuring a seamless migration with zero learning curveFree to use with comprehensive data analysis and spreadsheet functionalities

Frequently Asked Questions

Why is Excel slow only when saving files with external links?

During the save process, Excel attempts to validate, refresh, and synchronize the external linked data with the remote SharePoint or OneDrive server. This background process can take several minutes depending on file size, network speed, and server response times, even if the application is responsive during normal typing.

How do I find and manage external links in my workbook?

Navigate to the 'Data' tab on the Excel ribbon and click 'Edit Links'. This dialog box allows you to view all external sources connected to your workbook, update their values manually, change the startup update prompts, or permanently break the links.

Will breaking external links speed up my workbook's performance?

Yes. Breaking external links converts all linked formulas into static values, permanently removing the need for Excel to query external files on SharePoint. This instantly and significantly improves file opening, calculating, and saving speeds, provided you no longer need the data to update automatically.

Excel & Data Problems