> For the complete documentation index, see [llms.txt](https://faq.totlelab.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://faq.totlelab.com/totle-faq/installation-and-updates/4266ver.md).
# Microsoft Office 2016 Pro ver. (16.0.0.4266)
### **Is your Microsoft Office version starts with 16.0.4266?**
Microsoft Office 2016 Pro version (16.0.4266) is a version released in November 2015, and may not have received updates since installation.
To ensure a seamless installation of totle, manual updates are necessary. Please follow the steps outlined below for the update process.
### **How do I check my Office version?**
1. Click **File** in the Outlook top menu.
2. Click the **Office Account** located in the lower left corner.
3. In the right pane, click on **About Outlook** .
4. You can check your Outlook version here.
You can check the name of the product you are using on the **subscription product**.
* In the **Product Information**, you can verify the product name you are using
(e.g. Microsoft 365 ProPlus or Office Home and Student).
* On the **About Outlook** information window, you can check the detailed **installation information** such as the **version number and build numbers.**
* If the **version information starts with 16.0.4266**, please manually update your Outlook via the link below.
* **Please make sure to close Outlook before proceeding with the manual update.**
For MS Office 32-bit
For MS Office 64-bit