Microsoft Office 2021 Pro Plus LTSC is the Long-Term Servicing Channel edition of Office 2021 Professional Plus. It delivers the full set of desktop apps with a fixed feature set, no subscription and no surprise interface changes. It is a low-cost choice for one Windows PC. Order from Mcdkeys and receive your key by email.
What Is Office LTSC 2021?
LTSC stands for Long-Term Servicing Channel. Microsoft created it for organisations that want a stable version of Office that stays the same over time. The apps are the familiar Office 2021 programs. The difference is in licensing and updates: features are locked at release and there are no cloud-driven feature changes.
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Product: Microsoft Office LTSC Professional Plus 2021 licence key
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Licence: one-time purchase for 1 PC, lifetime activation
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Delivery: key and installation instructions by email
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Platform: Windows 10 and Windows 11
Included Applications
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Word 2021: documents with improved editing and accessibility tools.
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Excel 2021: XLOOKUP, dynamic arrays and faster calculation.
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PowerPoint 2021: slide show recording and smoother media playback.
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Outlook 2021: email, calendar and contacts.
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Access 2021 and Publisher 2021: databases and desktop publishing.
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OneNote and Microsoft Teams: notes and meetings.
LTSC or Retail Office 2021?
|
Pro Plus LTSC |
Pro Plus retail |
| Core apps |
Same |
Same |
| Feature set |
Fixed |
Fixed |
| Aimed at |
Business and volume use |
Individual buyers |
| Price |
Lower |
Higher |
Prefer the retail edition? See Office 2021 Professional Plus.
System Requirements
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Operating system: Windows 10 or Windows 11
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Processor: 1.6 GHz or faster, 2 cores
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Memory: 4 GB RAM
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Storage: 4 GB of free disk space
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Display: 1280 x 768 or higher
How to Install and Activate
- Install Office LTSC 2021 Professional Plus using the download link and instructions in your order email.
- Open Word or Excel.
- Go to File, then Account, then Change Product Key.
- Enter your 25-character key and follow the prompts to activate online.
The key works with the LTSC edition only, so use the installer we provide.
Office 2021 Support Status
Microsoft ended support for Office LTSC 2021 on 13 October 2026. The apps continue to work but no longer receive updates.
Office 2021 Pro Plus LTSC FAQ
Is LTSC a full version of Office?
Yes. You get the complete Professional Plus desktop apps.
Is there a subscription?
No. It is a one-time purchase.
Will this key activate retail Office 2021?
No. It activates the LTSC edition only.
Does it work on Mac?
No. This product is for Windows.
What if my key does not activate?
Contact support@mcdkeys.com or use live chat. Our Refund Policy explains your options.
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