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In many cases, you can install Office, Project, and Visio on the same computer. But, there are some combinations of Office, Project, and Visio that can't be installed together on the same computer.The two main things that determine whether Office, Project, and Visio can be installed together on the same computer are the version of the product and the installation technology used to install the product. What governs whether an installation scenario is supported are these two rules:

You can't install two products together that have the same version but use different installation technologies.
You can't install two products of different versions together if both products use Click-to-Run as the installation technology and those products have overlapping Office applications.

If this is the first time you're installing Office you may have some setup steps to do first. Expand the learn more section below. However, if you're reinstalling Office, and you've already redeemed a product key and have an account associated with Office, then go to the section sign in and install Office on your PC or Mac. Hi HermieL, it would probably be best to uninstall and re-install Office, if you are getting a 'Product Key already used' error. You need to deactivate your previous Installation and then re-install Office 2016 Go to and sign in using your Microsoft account, if prompted.

See the example installation scenarios section for several examples of installation scenarios that are supported and not supported, along with an explanation of why they are or aren't supported, based on the rules listed above.

Office releases and their version number

The following table shows Office releases that are currently supported by Microsoft, their associated version, and all the possible installation technology. The information listed in the table also applies to releases of Project and Visio. For example, the subscription version of the Project desktop app or Visio Professional 2016.

Office release	Version	Installation technologies
Office 365 (and Microsoft 365)	16.0	Click-to-Run Microsoft Store
Office 2019	16.0	Click-to-Run Microsoft Store
Office 2016	16.0	Click-to-Run Windows Installer (MSI) Microsoft Store
Office 2013	15.0	Click-to-Run Windows Installer (MSI)

You can find this version information by going to Control Panel > Programs > Programs and Features. You can also find this version in the About dialog for the Office app. For example, open Word, and go to File > Account > About Word. On the top line of the About Microsoft Word dialog box, you will see the version number. For example, Microsoft Word 2019 MSO (16.0.10336.20044) 32-bit. For steps to find this version in different Office releases, see Find details for other versions of Office.

Note

Office 365, Microsoft 365, Office 2019, and Office 2016 all have the same version: 16.0
Office 2010, which is no longer supported, had a version of 14.0 and used Windows Installer (MSI) as the installation technology.

Installation technologies used by Office

There are different ways to purchase Office, Project, and Visio. For example, you can purchase them as part of an Office 365 (or Microsoft 365) plan, as a one-time purchase from a retail store, or through a volume licensing agreement. How you purchase them, along with which Office release you purchased – for example, Office 365 or Office 2016 – determines what installation technology is used to install Office.

Mac protection. The three installation technologies are:

Click-to-Run
Windows Installer (MSI)
Microsoft Store

Office 2016 Mac Key

In newer releases of Office, you can go to File > Account in any Office app, such as Word, and the type of installation technology is listed under the Product Information section.

Key Already Used Office 2016 For Mac

Another way to tell which installation technology was used to install Office is to File > Account in any Office app. Under the Product Information section, if you see an Update Options choice, Office was installed by using Click-to-Run. If you don't see an Update Options choice, and you don't see any mention of Microsoft Store, then Office was installed by using Windows Installer (MSI).

The Microsoft Store installation technology is only used when you purchase and install Office from the online Microsoft Store.

You can't rely on just the product name and release to determine the installation technology used by Office. For example, if you purchase Visio Standard 2016 from a retail store, it uses Click-to-Run. But, if you purchase Visio Standard 2016 through a volume licensing agreement, it uses Windows Installer (MSI).

Example installation scenarios

Here are some example installation scenarios, whether they're supported, and an explanation of why they are or aren't supported.

Products to install	Supported?	Explanation
Microsoft 365 Apps Project Professional 2013 (volume licensed)	Yes	They use different installation technologies (Click-to-Run and MSI) and they are different versions (16.0 and 15.0)
Microsoft 365 Apps Access 2013 (retail purchase)	No	They both use Click-to-Run and they are different versions (16.0 and 15.0), but Microsoft 365 Apps already includes Access.
Microsoft 365 Apps Visio Professional 2013 (retail purchase)	Yes	They both use Click-to-Run, they are different versions (16.0 and 15.0), and there is no overlap in applications.
Office Professional Plus 2019 (volume licensed) Visio Professional 2016 (volume licensed)	No, but there is an alternative installation method available.	They use different installation technologies (Click-to-Run and MSI), but they are the same version (16.0). For more information about the alternative installation method that's available, see Use the Office Deployment Tool to install volume licensed versions of Project 2016 and Visio 2016.
Office Standard 2019 (volume licensed) Visio Standard 2013 (volume licensed)	Yes	They use different installation technologies (Click-to-Run and MSI) and they are different versions (16.0 and 15.0).
Microsoft 365 Apps Visio Professional 2016 (volume licensed)	No, but there is an alternative installation method available.	They use different installation technologies (Click-to-Run and MSI), but they are the same version (16.0). For more information about the alternative installation method that's available, see Use the Office Deployment Tool to install volume licensed versions of Project 2016 and Visio 2016.
Microsoft 365 Apps Project Professional 2019 (volume licensed)	Yes, but with a caveat. ¹	They both use Click-to-Run and are the same version (16.0).
Microsoft 365 Apps Visio Standard 2019 (retail)	Yes, but with a caveat. ¹	They both use Click-to-Run and are the same version (16.0).

¹ You must be using at least Version 1808 of Microsoft 365 Apps, because that's the earliest version that recognizes Office 2019 products, including Project and Visio. Version 1808 or later is available in Current Channel, Monthly Enterprise Channel, Semi-Annual Enterprise Channel (Preview), and Semi-Annual Enterprise Channel. Download free apps for macbook pro. For Microsoft 365 Apps rele

Office 2016 Mac Key Already Used