How to continue using MS publisher after end date

A genuine perpetual license for Publisher 2021 can still be installed and used after October 2026, but it will be unsupported; the Softwaremart listing alone does not confirm that the supplied license is genuine or that it will coexist reliably with Microsoft 365.

What happens after October 2026

• Publisher supplied through Microsoft 365: Access will be removed on or shortly after October 1, 2026, and Microsoft 365 subscribers will no longer be able to use Publisher to open or edit .pub files.
• Perpetual Publisher 2021: It can still be installed and used after retirement, including opening and editing Publisher files.
• Support ends: Publisher 2021 reaches end of support on October 13, 2026. Thereafter it receives no security updates, bug fixes, or technical support.^1^ Microsoft’s lifecycle listing confirms the same end date.^2^

Therefore, “usable after Microsoft discontinues Publisher” is accurate only if the product is a genuine perpetual license. It does not mean that Publisher remains supported or secure.

Check before purchasing

Ask the seller—in writing—to confirm all of the following:

1. It is a perpetual Publisher 2021 license, not a Microsoft 365 subscription.
2. It is a legitimate retail license authorized for resale, not a volume-license, education, developer, OEM recovery, or organization-owned key.
3. The license can be redeemed against your own Microsoft account, rather than activated using an account or installer supplied by the seller.
4. It is valid in your country and includes a refund if Microsoft rejects or later blocks the key.
5. The download and activation occur through Microsoft’s normal setup process.
6. The license architecture and system requirements match your Windows computer.

Microsoft warns that separately sold keys can be stolen, abused, or unauthorized and may later be blocked. If a key becomes invalid, Microsoft’s advice is to request a refund from the seller.^3^ Microsoft also provides guidance for recognizing genuine Office licensing.^4^

There is not enough authoritative information to confirm that Softwaremart’s particular key is genuine. A low price or successful initial activation does not by itself establish that the license is authorized or will remain valid.

“Compatible with Office 365” needs caution

If Microsoft 365 desktop applications are already installed, do not assume standalone Publisher 2021 will work independently beside them. Microsoft states that, in most cases, Microsoft 365 and non-subscription Office 2021 products cannot run together on the same PC. Installation technology, overlapping applications, bitness, and installation order can produce installation or activation conflicts.^5^

The safer arrangement is:

• Keep Microsoft 365 on the main computer.
• Run the perpetual Office/Publisher 2021 installation on a separate compatible Windows PC or properly licensed isolated environment.

If the seller promises that its Publisher product will run alongside your existing Microsoft 365 installation, request the exact supported configuration and refund terms before paying.

Protect existing Publisher files

Even if Publisher 2021 continues running, unsupported software could eventually fail because of operating-system or hardware changes. Before October 2026:

• Keep the original .pub files and backups.
• Export important finished publications through File > Save As > PDF.
• For content that must remain editable, test conversion through PDF into Word, understanding that complex layouts may change.
• For many files, Microsoft provides a PowerShell bulk-export example in its Publisher retirement guidance.^1^

In short: Publisher 2021 can continue beyond October 2026 if the license is genuinely perpetual, but purchasing this listing carries separate license-authenticity and Microsoft 365 coexistence risks.

References

1. Microsoft Publisher will no longer be supported after October 2026 | Microsoft Support
2. Ending Support in 2026
3. Error code 0xC004C060 when activating Office | Microsoft Support
4. Stay safe with a genuine Office license | Microsoft Support
5. Install and use different versions of Office on the same PC | Microsoft Support