How to Activate Microsoft Office 2021 or 2019 by Phone

Published by Nyau Wai Hoe - Updated on

Getting Microsoft Office 2021 or 2019 up and running at its best means activating it properly. Sometimes, doing this over the phone is easier or the only way to go, like when the internet is not an option, or you’re a bit worried about security. This guide is all about helping you activate your Microsoft Office by phone, making sure you’re all set even if you prefer talking it through or just can’t get online.

Also see: Will Microsoft Office 2010 Run on Windows 11?

How to Activate Microsoft Office 2021 2019 by Phone


Before you jump into activating Microsoft Office 2021 or 2019 over the phone, you need a few things ready:

  1. Have a real Microsoft Office product key.
  2. A phone line to call Microsoft’s automated service.
  3. Access to the computer where Office is installed.
  4. Administrative rights on the computer for the activation.
  5. The Microsoft Office suite should already be on your computer but not yet activated.

Keep in mind, these steps might change a bit based on where you are and which Office version you have. It’s best to look at the official guides for the most correct info.

Related concern: What is OInstall.exe (Virus?) and its ties to Office 2019/2021

Step-by-step guide for activating Office by phone

Finding the product key

Your Microsoft Office product key is a 25-character code that’s usually in your product box or in an email if you bought it online. You can find your product key:

  • In the box if you got a physical copy, often on a sticker or card.
  • In your email receipt or the retailer’s website if you bought it digitally.
  • On a sticker on your device or with the paperwork if Office was already installed when you got your computer.

Finding Office 2021 2019 product key

Related resource: How to Find Windows 11/10 Digital License Product Key

Initiating the phone activation

Here’s how you get the phone activation started:

  1. Open any Office app, like Word or Excel.
  2. If it doesn’t ask for a product key right away, go to “File” and then “Account”.
  3. Under “Product Information”, look for “Activate Product”.
  4. Click on “I have a product key” and put yours in.Microsoft Office 2021 2019 Enter your product key phone activation
  5. When it asks how you want to activate, pick “I want to activate the software by telephone” instead of over the 2021 phone activation

Noting down the installation ID

Choosing phone activation will show you an Installation ID. You need this ID when you call. It’s a bunch of numbers. Write it down!

  1. After choosing phone activation, you’ll see your Installation ID. It’s long, so be ready to write it down.Activate Office by telephone Installation ID

Making the call

With your Installation ID in hand, you’re set to call Microsoft. Here’s what to do:

  1. Look for the toll-free number in the activation window. Select the country or region you are calling from. It will then display a toll-free number that you can call. Most countries have a number with a free call at the expense of Microsoft.
    Microsoft Office phone activation toll free number
  2. Follow the voice instructions on the call.
  3. Enter your Installation ID when asked.
  4. The system will check your ID and then give you a Confirmation ID. Write it down!

Entering the confirmation ID

Now, take the Confirmation ID from the call and type it into the Office activation wizard on your computer.

Microsoft Office activation by phone Confirmation ID

This finishes the activation process. If you did everything right, you’ll see a message that Office is now activated.

Office 2019 phone activation

Useful guide: How to Check Office 365 User License Using PowerShell

Important points

  • Phone activation is all good if you have a legit license or product key.
  • There might be costs for the call, depending on where you’re calling from and your phone service.
  • If phone activation gives you trouble, you can always ask a customer service rep for help.

Pro tip: How to Transfer Windows 11/10 License to Another Computer

Common Office phone activation issues

Sometimes, things don’t go smoothly. If you hit a problem, here’s what might be happening and how to fix it:

Error messages during activation

Getting “Product Key Invalid” or “Activation Failed”? Check your product key again. Make sure it matches your Office version.

Cannot reach the automated phone system

If you can’t get through to the phone system, double-check the number and maybe try calling at another time.

Did not receive a confirmation ID

No Confirmation ID? Make sure you entered the Installation ID right. If it still doesn’t work, you might need to talk to Microsoft support.

Activation wizard won’t open

If the activation wizard is being stubborn, try running Office as an admin. If that doesn’t do the trick, a repair install could help.

Linked issue: Windows 11 Not Activated After BIOS Update

Why would you want to activate Office by telephone?

Even though activating online is usually simpler, here are a few reasons why phone might be better for you:

  • If your computer’s not online yet, phone activation is a handy alternative.
  • Worried about security? Phone activation might feel safer.
  • If online activation’s not working because of tech hiccups, try the phone.
  • In some workplaces or secure spots, you might not be able to activate online. Phone to the rescue!

Frequently asked questions

Can I activate older versions of Microsoft Office by phone?

Yes, but the steps might be a bit different. Look up the instructions for your Office version.

Is phone activation free?

Usually, yes, but check the rates for your area just to be sure.

Can I use the same product key on multiple computers?

Office product keys are mostly for one-time use. If you’ve got a key for multiple licenses, then yes, but each computer needs its own key.

What happens if I lose my confirmation ID?

If you lose your Confirmation ID, you’ll need to call again and get a new one.

How long does phone activation take?

It’s pretty quick, often just a few minutes, but it might vary.

A quick recap

Activating Microsoft Office by phone is pretty straight-up if you pay attention to the steps. It’s a great option when online isn’t working out, you’re worried about security, or you just can’t get online. Just make sure to keep your product key, Installation ID, and Confirmation ID handy, and follow the steps carefully. If you hit any bumps, Microsoft support is there to help.

Nyau Wai Hoe
Nyau Wai Hoe is the Founder and Chief Editor of With a degree in software engineering and over 12 years of experience in the tech support industry, Nyau has established himself as an expert in the field, with a primary focus on the Microsoft Windows operating system. As a tech enthusiast, he loves exploring new technologies and leveraging them to solve real-life problems.

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