Microsoft Office LTSC Professional Plus 2021 – Product Overview

Microsoft Office LTSC Professional Plus 2021 is the on-premises, offline-focused edition of Microsoft Office, designed for users and organizations that require stability, long-term reliability, and no dependency on cloud features. It includes a complete set of classic Office apps tailored for professional, business, and enterprise environments.

This edition is feature-locked, receiving only security and performance updates throughout its lifecycle—making it a highly stable and predictable productivity suite.

Why Choose Office LTSC Professional Plus 2021?

1. On-Premises, Offline Reliability

Ideal for environments that require full offline functionality, security, and independence from cloud services.

2. Stability & Long-Term Support

Office LTSC 2021 is feature-locked. It only receives security and performance updates, ensuring maximum stability.

3. Complete Professional Office Suite

Includes advanced Microsoft applications designed for professional workflows:

• Word

• Excel

• PowerPoint

• Outlook

• Access

• Publisher

Available Languages

The license supports multiple official language versions:

Brazilian Portuguese
Greek
Slovak
Spanish (Latin America)
Chinese
Czech
German
Spanish
Finnish
French
Italian
Japanese
Korean
Polish
Portuguese
Russian
Vietnamese
English
Turkish
Dutch
Norwegian
Arabic
Romanian
Ukrainian
Swedish
Hungarian
Bulgarian
Thai
Danish

Product Description

Microsoft Office Professional Plus 2021 delivers a complete collection of classic Office applications tailored for PC users. It is suitable for professionals, businesses, freelancers, families, and anyone looking for a stable, high-performance workstation.

With this suite, you can create documents, manage spreadsheets, design presentations, organize data, publish content, and handle emails—using powerful tools trusted worldwide.

Office 2021 is compatible with Windows 10 and Windows 11 only.

Included Applications

• Word – Create and edit documents

• Excel – Manage data, calculations, finance, and analysis

• PowerPoint – Build professional presentations

• Outlook – Manage emails, contacts, and calendar

• Access – Manage databases and data resources

• Publisher – Create and publish visual content

License Information

• One-time purchase

• One-PC license

• No subscription required

• Full access to all Office LTSC 2021 applications after activation

Microsoft Office – Activation Guide

Below are the official activation options available to users. Follow one of the methods depending on your preference and installation type.

1. Download or Deploy Office

Download Software (ISO)

You can download the installation ISO for Microsoft Office versions 2013 / 2016 / 2019 / 2021 from official Microsoft links (Office Professional, Professional Plus, Home & Business, Home & Student, etc.).

Deploy LTSC Version

LTSC versions must be deployed using the Office Deployment Tool (ODT).

Activation Methods

A. Activation by Phone

1. Install Office.

2. Open any Office app.

3. Select “I want to activate the software by telephone.”

4. Choose your country/region.

5. Call the provided number.

6. Enter your Installation ID when prompted.

7. Receive the Confirmation IDs.

8. Enter the numbers into the activation window.

9. Select Next → Finish.

B. Activation by Browser

1. Visit the Office Setup website.

2. Sign in with your Microsoft account.

3. Enter your purchased key and complete redemption.

4. Assign the software to your Microsoft account.

5. Complete installation.

If browser activation fails, click “Back” and activate by phone.

C. In-App Activation

1. Open an Office app (Word, Excel, etc.).

2. Go to File → Account.

3. Select Activate Product.

4. Enter your key.

5. Click Activate.

If telephone activation seems disabled, Microsoft still supports it via their support page.

Microsoft Office LTSC – Detailed Deployment Steps

1. Download the Office Deployment Tool (ODT).

2. Create a configuration.xml using the Office Customization Tool (OCT).

3. Use the following command in an elevated Command Prompt:
   setup /download configuration.xml

4. When files are downloaded, install using:
   setup /configure configuration.xml

Important for LTSC

• Must be deployed to install

• Does not link to a Microsoft account

• Recommended activation method: Telephone (automated system)

• No online redemption website is available for LTSC

Important Notes

• Some sections above reference official Microsoft procedures for installation and activation.

• For LTSC versions, deployment is required before activation.

• Activation availability may vary depending on your region and Microsoft policies.