Office Compatibility Issues

Can Office 2021 Open Files Created with Microsoft 365?

Phi Hung Vo Oct 14, 2026 868 views

Question details

The user is inquiring if they can continue to open and edit their Microsoft 365 files using the one-time-purchase version of Office 2021 after their subscription ends.

Product: Microsoft Office 2021 and Microsoft 365
Device & OS: not provided
Scenario: Transitioning from a recurring Microsoft 365 subscription to a perpetual Office 2021 license.
Observed behavior: The user needs assurance that their existing documents will remain accessible and editable without an active Microsoft 365 subscription.

Before you start

Ensure you have adequate local storage space on your computer before attempting to download your files from OneDrive.

Solution 1Recommended

Downloading OneDrive Files to Open in Office 2021

You can seamlessly open Microsoft 365 files in Office 2021, but you must first download your files from OneDrive to your local computer to avoid losing access when your subscription expires.

Office 2021 natively supports the same file formats used by Microsoft 365, so opening local documents will not be an issue.

However, because transitioning away from Microsoft 365 means losing your 1 TB of cloud storage, securing your files locally is the most critical step.

Access OneDrive online

Navigate to the OneDrive website in your browser and sign in with your Microsoft account before your Microsoft 365 subscription expires.

Select files for download

Highlight the documents, spreadsheets, and presentations you wish to keep by clicking the check circles in the upper-right corners of the file icons.

Download to local drive

Click the 'Download' button at the top menu to save these files directly to your computer's hard drive. They will typically download as a compressed ZIP file.

Extract and open with Office 2021

Extract the downloaded ZIP file. Then, launch Word, Excel, or PowerPoint 2021, click 'File', select 'Open', and browse to the location of your downloaded files to continue editing them.

Downloading OneDrive Files to Open in Office 2021

OneDrive Storage Limit: When your Microsoft 365 subscription expires, your included 1 TB of OneDrive storage will automatically be reduced to the free 5 GB limit. Any files exceeding this limit may become locked or inaccessible if not backed up locally in advance.

Free Microsoft Office alternative

Try WPS Office as a Free, Lightweight Alternative

If your Microsoft 365 subscription is expiring and you prefer not to purchase an expensive Office 2021 license, WPS Office is an excellent, free alternative. It provides high compatibility with all Microsoft file formats, enabling you to continue working on your documents seamlessly without the high costs.

1. Download and Install: Visit the official WPS Office website and download the free installation package for your operating system.
2. Open Your Files: Launch WPS Office, click on 'Open' from the main dashboard, and select your saved Microsoft 365 files to start editing instantly.

Fully compatible with Microsoft 365 and Office 2021 formats, including DOCX, XLSX, and PPTX.100% free to download and use for all essential office tasks.Familiar, intuitive ribbon user interface for a smooth transition without a steep learning curve.Lightweight software that consumes fewer system resources than standard Microsoft installations.

microsoft office alternative - wps office

Frequently Asked Questions

Will I lose document formatting when opening Microsoft 365 files in Office 2021?

No, Microsoft 365 and Office 2021 utilize the same standard file formats (.docx, .xlsx, .pptx). Your formatting, layouts, and data will be fully preserved when migrating between the two versions.

What happens if I forget to download my OneDrive files before my Microsoft 365 subscription ends?

Your OneDrive account will revert to the standard free 5 GB limit. If your files exceed this amount, your account becomes read-only, meaning you can still view and download files but cannot upload or edit them directly in the cloud until you free up space.

Can Office 2021 use the new premium features introduced in Microsoft 365?

While Office 2021 can open the files, it lacks the continuous updates, cloud-connected features, and AI-driven tools of Microsoft 365. Any content previously generated by those features will appear as standard, static elements that you can still view and edit.

Is there a free way to open Microsoft 365 files if I decide not to buy Office 2021?

Yes, you can use a free office suite like WPS Office. It offers robust compatibility with all Microsoft Office file formats, allowing you to open, edit, and save your documents easily without paying for a perpetual license or a subscription.

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