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What are the main features and key benefits of Microsoft Office 2021 Professional Plus?
Perpetual License – One-time purchase, no recurring subscription fees required.
Enterprise Suite – Full desktop apps for advanced business productivity.
Business Apps – Includes Outlook, Access, Publisher, Skype, Teams.
Offline Access – Work anywhere, even without an internet connection.
Better Collaboration – Coauthor documents and presentations in shared locations.
Volume Friendly – Designed for deployment and activation in organizations.
This product is not posted to the MS account and is not transferable to other devices.
MAK Key (Multiple Activation Key) or Volume License Key. One key with multiple activations for different devices.
Download: Office 2021 Professional Plus
Word - Create professional documents with advanced formatting tools.
Excel - Analyze data quickly with powerful functions and charts.
PowerPoint - Build engaging presentations with templates and animations.
Outlook - Manage email, calendars, contacts, and tasks efficiently.
OneNote - Capture notes, ideas, and meeting details in notebooks.
Publisher - Design brochures, flyers, and other marketing materials.
Access - Create and manage relational databases for business data.
Skype for Business - Handle messaging, calls, and online meetings where supported.
Teams - Collaborate via chat, meetings, and file sharing in groups.
Yes, it is offered as a perpetual license with a single upfront payment.
You pay once instead of an ongoing subscription fee.
The installed apps keep working after successful activation.
Ideal for organizations preferring predictable, one-time software costs.
Office 2021 Professional Plus is a fixed-feature one-time purchase, while Microsoft 365 is a subscription with continuous feature updates and cloud services.
Office 2021 keeps the same major feature set after installation.
Microsoft 365 adds new features and improvements over time.
Microsoft 365 bundles additional services like Exchange, SharePoint, and OneDrive.
Office 2021 is best for stable on-premises setups without frequent changes.
Professional Plus includes all Standard apps plus advanced tools like Access and often additional collaboration options, making it better suited for larger organizations.
Professional Plus adds Access and Publisher compared with many Standard editions.
Professional Plus is typically licensed through volume licensing programs.
Standard editions are often aimed at smaller businesses and specific scenarios.
Yes, Professional Plus is primarily distributed through volume licensing channels for organizations rather than as a regular home retail product.
Designed for deployment across multiple managed devices in a company.
Supports activation via KMS or Active Directory in many environments.
License terms and installation options are tailored to IT administrators.
Yes, all desktop apps work offline once installed and activated on the device.
You can create, edit, and save files without an internet connection.
Internet is only needed for activation, updates, and online collaboration features.
Offline capability is useful for secure or bandwidth-limited environments.
You need a supported version of Windows with sufficient CPU, RAM, and storage to run Office 2021 Professional Plus smoothly.
Requires a modern Windows 10 or Windows 11 installation.
Needs several gigabytes of free disk space for apps and updates.
A reliable internet connection is recommended for activation and updates.
Office 2021 follows a fixed lifecycle with security updates provided until its published end-of-support date.
After support ends, security updates are no longer released for the suite.
The apps may still run but with increasing security and compatibility risks.
Organizations often plan upgrades before the official end-of-support point.
The number of devices allowed depends on your specific volume license agreement and activation method.
Many agreements license Professional Plus per device or per user.
KMS or Active Directory activation lets you manage multiple installations centrally.
Always follow the terms defined in your volume license contract.
Most organizations activate Office 2021 Professional Plus using Key Management Service or Active Directory-based activation.
KMS lets devices automatically renew activation when connected to the network.
Active Directory activation works when machines join the organization domain.
IT admins control keys, activation servers, and deployment tools centrally.
"Perfect for our company because we keep the familiar Office apps without a subscription."
"Access and Publisher in the same suite make reporting and marketing much easier for us."
"Deployment through volume licensing was straightforward and integrates well with our existing infrastructure."
"Performance is solid, and staff appreciate that nothing major changes every month."
"One-time licensing fits our budgeting model better than ongoing cloud subscriptions."
Instant delivery - Product keys and downloads available within minutes.
Activation guarantee - If activation fails, you receive a new key.
Download included - Secure official download link always provided after purchase.
Easy installation - Clear step-by-step instructions guide you through setup.
Genuine licenses - Product keys from audited, legally compliant distribution channels.
Multilingual support - Help in seven languages via chat, email, phone.
Easy exchanges - Problematic keys replaced quickly, without unnecessary bureaucracy.
Transparent pricing - No hidden fees. Fair prices and price plans to get even better prices.
Trusted seller - Over 2800 Trustpilot ratings averaging 4.8 out of 5.
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Platform |
Windows |
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Supported Operating System |
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Processor |
1.1 GHz or faster, 2-core |
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Random access memory |
4 GB RAM |
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Hard Disk Space |
4 GB |
keys.express and keys.discount is a web platforms for new and used product keys. The product keys for Windows and other software available in the shop of keys.express and keys.discount are cheap, safe, legal and with activation guarantee.
Here you can find some general information about used software, an overview of the most important legal information as well as answers to frequently asked questions from our customers ("FAQ“)
Used software is available for sale in the European Union as well as in Switzerland according to current jurisdiction provided that the necessary conditions are met. The necessary conditions are as follows:
keys.express and keys.discount ensure that the above mentioned requirements are met and that a legal use of the software is guaranteed. The requirements of the European legislation are also met in Switzerland.
You can find further information on:
There is a lot of legal information about the topic of used software. We are more than happy to answer any questions you may have. You can contact us at any time via welcome(at)keys.express. In the meantime, you can also find a short overview of the most important legal information regarding used software here:
For distance contracts concluded by telephone, on the Internet or when ordering from a catalogue, EU law provides for the possibility for consumers to withdraw from the contract for a certain period of time ("right of withdrawal"). A consumer in this sense is any natural person who concludes a legal transaction for purposes that are predominantly neither commercial nor self-employed. In Switzerland we usually speak of consumers.
Consumers have the right to cancel the contract within fourteen calendar days without giving reasons. The revocation period begins on the day the contract is concluded.
In order to exercise your right of withdrawal from keys.express or keys.discount, you must inform us by means of a clear statement (e.g. a letter, fax or e-mail sent by post) of your decision to withdraw from this contract. For this purpose, you can contact us using the following information:
Keys Distribution Ltd
Suite 2, 215 Main Street
Gibraltar Heights, Gibraltar
Phone +423 7989130
Email: welcome@keys.discount
keys.express and keys.discount also provides a template revocation form. In order to comply with the revocation period, it is sufficient to send the notification of the exercise of the right of revocation to Keys Distribution Ltd before the end of the revocation period.
If you revoke this contract, we must reimburse you for all payments which we have received from you for the corresponding order, including delivery costs (with the exception of additional costs which result from the fact that you have chosen a different type of delivery than the cheapest standard delivery offered by us), immediately and at the latest within fourteen calendar days from the day on which we receive notification of your revocation of this contract. For this repayment we will usually use the same means of payment that you used for the original transaction, unless expressly agreed otherwise with you. In no case will you be charged for this refund.