The original release build of Office 2016 was 16.0.4266.1001 (July 2015). Over the years, Microsoft released several major updates. The final significant "feature update" for Office 2016 came via Update 16.0.5369.1000 (late 2020). After that, only security and reliability updates were issued.
As of 2026, the latest build number for Office 2016 Professional Plus (with all updates applied through October 2025) is approximately 16.0.5450.1000. To get this version, you must run Windows Update and install all "Security Updates" for Office 2016, even though new feature development ended years ago.
Crucial Note: There is no "Office 2016 version 17" or "Office 2016 version 2." If you see a seller advertising "Office 2016 Professional Plus 2024 edition," that is a counterfeit. The last official release remains 16.0.
Do not wait until October 2025. Auditing for Office 2016 in your environment should begin now. microsoft office 2016 professional plus latest version
Symptom: With the latest version, Skype for Business may fail due to Microsoft deprecating basic authentication.
Fix: Ensure you enable Modern Authentication in the registry:
Key: HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Common\Identity
DWORD: EnableADAL = 1
DWORD: Version = 1
Meta Description: Looking for the Microsoft Office 2016 Professional Plus latest version? This guide covers build numbers, new features, system requirements, security updates, and why it remains a powerhouse for businesses in 2025. The original release build of Office 2016 was 16
| Problem | Solution | |---------|----------| | “Product deactivated” | Re-enter key or reactivate via phone activation. | | Updates fail | Run Microsoft Support and Recovery Assistant (SaRA). | | Missing apps (Access, Publisher) | Modify installation → add them. | | Slow performance | Disable hardware graphics acceleration → File → Options → Advanced → Display. |
While it lacks the AI-driven features of Microsoft 365 Copilot or the real-time co-authoring of the subscription version, the final build of Office 2016 Professional Plus remains exceptionally capable.
To remove Office 2016 completely:
Then install Microsoft 365 or Office 2024.
If your business uses a Volume Licensing agreement with Microsoft, you can download the latest version (including the August 2024 build) from the Microsoft Volume Licensing Service Center (VLSC) . Search for “Office Professional Plus 2016” and look for the most recent release date.