Office 365概要

Office 365について調べてます。

Office 365概要

  • 現時点の実体はOffice 2013。
  • Office 2013を期間契約のサブスクリプション版にしたもの。
  • 特典としてクラウドストレージ利用などが可能になる。
  • ProPlus契約にすると、インストールをオンラインのポータル経由で、必要なアプリだけダウンロード、といった「クイック実行」が可能になる*1
  • ProPlusにしてクイック実行版にすると、App-Vと呼ばれる仮想化技術を使ってPC上に仮想アプリとしてOffice 2013がインストールされる。この場合、古いOfficeとの共存も可能になる*2


Office 365 ProPlus概要


Office 365 ProPlus の概要/Microsoft TechNetライブラリ





クイック実行(Click-to-Run)版Office 2013のOutlookと、Outlook 2007または2010を共存させた場合の問題について、下記のページに記載がありました。

Potential problems if you have Outlook 2013 and an earlier version of Outlook installed on the same computer/Microsoft Support


Outlook 2010 から Outlook 2013 への移行の考慮事項/Microsoft TechNetライブラリ


App-V を使用して Microsoft Office 2013 を展開する/Application Virtualization 5
新しい Office の企業内クイック実行展開と App-V 展開 (に成功)/山市良のえぬなんとかワールド

参考: Office 365 ProPlus の概要/Microsoft TechNetライブラリ(転記)


About Microsoft 365 Apps in the enterprise

Microsoft 365 Apps is a version of Office that's available through many Office 365 (and Microsoft 365) plans. It includes the applications that you're familiar with, including Access, Excel, OneDrive, OneNote, Outlook, PowerPoint, Publisher, Skype for Business, Teams, and Word. You can use these applications to connect with Office 365 (or Microsoft 365) services such as SharePoint Online, Exchange Online, and Skype for Business Online.

Microsoft 365 Apps is similar to other versions of Office

Microsoft 365 Apps is similar to other versions of Office that you can deploy to your users. Here are some important similarities:

  • Microsoft 365 Apps is a full version of Office.
  • Its system requirements (for example, memory, hard disk space, and operating system) are similar to other current versions of Office. For more information, see System requirements for Office.
  • Like other versions of Office, Microsoft 365 Apps is available in a 32-bit and a 64-bit version. To decide which version is right for your environment, carefully review Choose between the 64-bit or 32-bit version of Office before you deploy.
  • When you deploy Microsoft 365 Apps, it's installed on the user's local computer. Microsoft 365 Apps is not a web-based version of Office. It runs locally on the user's computer. Users don't need to be connected to the internet all the time to use it.
  • You can use many of the same tools to deploy and configure Microsoft 365 Apps that you're already using to deploy Office. For example, you can use Microsoft Endpoint Configuration Manager to deploy Microsoft 365 Apps. For more information, see Choose how to deploy.
  • In addition, you can use many of the same Group Policy settings that you use with other versions of Office to configure and enforce Microsoft 365 Apps program settings.
What's different about Microsoft 365 Apps?

Even though Microsoft 365 Apps is a lot like other versions of Office, there are differences, including for Deployment differences and Licensing differences.

The most significant difference is that Microsoft 365 Apps is updated regularly, as often as monthly, with new features, unlike non-subscription versions of Office. For a list of new features, see What's new in Microsoft 365.

Deployment differences
  • By default, Microsoft 365 Apps installs as one package. This means that all Office applications are installed on the user's computer. But, you can configure the deployment to exclude or remove certain Office applications, such as Access, from client computers.
  • Because Microsoft 365 Apps uses a different installation technology, called Click-to-Run, there's a different way to apply software updates, such as security updates. By default, Microsoft 365 Apps is configured to automatically install updates from the Office Content Delivery Network (CDN) on the internet. But, you can configure Microsoft 365 Apps to install updates from a location within your own network or you can manage updates to Microsoft 365 Apps with Microsoft Endpoint Configuration Manager.
  • Microsoft 365 Apps also provides the ability to control how often users receive feature updates. For example, users can get new features to Microsoft 365 Apps as soon as they're ready, or once a month (on the second Tuesday of the month), or twice a year (in January and July, on the second Tuesday). For more information, see Overview of update channels for Microsoft 365 Apps.
  • Office 365 (and Microsoft 365) provides a web-based portal where users can install Microsoft 365 Apps themselves. Keep in mind that users have to be local administrators on their computers to install Microsoft 365 Apps. If users aren't local administrators, you'll have to install Microsoft 365 Apps for them. Also, if you don't want your users to install from the portal, you can prevent that. For more information, see Choose how to deploy.
Licensing differences
  • Users can install Microsoft 365 Apps on up to five different computers with a single Office 365 license. For example, a user can have Microsoft 365 Apps installed on a computer in the office, on a laptop to use when traveling, and on a home computer. Users can also install on up to 5 tablets and 5 phones.
  • Microsoft 365 Apps is offered as a subscription. If you cancel your subscription, Microsoft 365 Apps goes into reduced functionality mode. In reduced functionality mode, users can open and view existing Office files, but users can't use most of the other features of Microsoft 365 Apps. For more information, see Overview of licensing and activation in Microsoft 365 Apps.
  • To use Microsoft 365 Apps, a user must have an Office 365 (or Microsoft 365) account and have been assigned a license. If the user's license or account is removed, the user's installations of Microsoft 365 Apps go into reduced functionality mode.
  • Even though users don't need to be connected to the internet all the time to use Microsoft 365 Apps, users must connect to the internet at least once every 30 days. This is so that the status of their Office 365 (or Microsoft 365) subscriptions can be checked. If users don't connect within 30 days, Microsoft 365 Apps goes into reduced functionality mode. After users connect to the internet and their subscription status is verified, all the features of Microsoft 365 Apps are available again.
More information about Microsoft 365 Apps
  • You can use Microsoft 365 Apps with supported versions of Exchange Server (Exchange Server 2013 or later) or SharePoint Server that are installed on-premises in your organization. Or, if they're part of your Office 365 (or Microsoft 365) plan, you can use Microsoft 365 Apps with Exchange Online and SharePoint Online.
  • Users can store the files they create with Microsoft 365 Apps on their local computers or elsewhere on your network, such as a SharePoint site. Office 365 (and Microsoft 365) also provides cloud-based file storage options.
  • Microsoft 365 Apps isn't the same as the web versions of the Office applications. The web versions let users open and work with Word, Excel, PowerPoint, or OneNote documents in a web browser. The web versions of these Office application are included with all Office 365 (and Microsoft 365) plans.
  • Read the Microsoft 365 and Office 365 service descriptions to learn more about what's included in Office 365 (and Microsoft 365).

参考:KB 2782408 内容転記


Potential problems if you have Outlook 2016 or 2013 and an earlier version of Outlook installed on the same computer

With the Click-to-Run installation type of Microsoft Office 2016 and Office 2013 you can run two different versions of Microsoft Outlook on the same computer. Consider the following possible scenarios:

  • You have Office 2016 Click-to-Run installed side-by-side with a MSI-based installation of Office 2013, Office 2010 or Office 2007.
  • You have Office 2013 Click-to-Run installed side-by-side with a MSI-based installation of Office 2016, Office 2010 or Office 2007.

In these scenarios, you may experience the following problems when you use the earlier version of Outlook.

  • Instant search is disabled in the earlier version of Outlook. If you are using the earlier version of Outlook in this coexistence configuration, you can still successfully search for items in your mailbox. However, these earlier versions of Outlook will not use Windows Desktop Search (Instant Search) functionality. In this configuration, Instant Search continues to function in the later version of Outlook.
  • You cannot send files from other programs if an earlier version of Outlook is running. If you try to send a file from another program in this situation, you may receive one of the following error messages:

The client operation failed.
This action is not supported while an older version of Outlook is running.

For example, this problem can occur if you right-click a file on your desktop, click Send To, and then click Mail Recipient while the earlier version of Outlook is running. To resolve this problem, make sure that the later version of Outlook is running when you send a file from another application.

  • Interoperability issues when using mixed Office program versions. You may encounter different issues if you use different versions of Word and Outlook for mail merge or other functionality that occurs across programs. For example, if you run Outlook 2016 and Word 2013, or if you run Outlook 2013 and Word 2010. If you must use shared features across different Office programs, make sure that you use the same version for each program. For example, if you start a mail merge in Word 2016, make sure Outlook 2016 is running.

Note You cannot have two different versions of Outlook installed on the same computer if you are using .msi files to install the different Office versions.


As a best practice, you should only have one version of Office installed on a computer. For migration scenarios, we realize there might be a need to have multiple versions of Office on the same computer for a short period of time. We recommend that you uninstall the earlier version of Office as soon as possible after you’ve migrated to the latest version of Office.

Uninstall your earlier Office version by using the Programs and Features control panel by following these steps.

  1. Open Control Panel.
  2. Under Programs, select Uninstall a program.
  3. In the Programs and Features window, select your earlier version of Office and then click Uninstall.
  4. Follow the instructions that are provided in the Office Setup interface to remove Office.


*2:新旧バージョンの共存について: 完全とは言えないようで、マイクロソフトも早めに新バージョンへ移行することを推奨しています。暫定的な機能と考えた方がよさそうです。

*3:新旧共存は短期間が良いという記述例: http://support.microsoft.com/en-us/kb/2782408