Whenyou start an Microsoft 365 app that's not activated, you'll be prompted to sign in to Microsoft 365. Be sure to sign in using the Microsoft account, or work or school account, that you used to buy or subscribe to Microsoft 365.
To use Microsoft 365 on your new device, you can activate Microsoft 365 as a 1-month trial of Microsoft 365 Family. You can also buy Microsoft 365, add Microsoft 365 to an existing Microsoft 365 subscription, or enter a product key from a new product key card. If you have an older copy of Microsoft 365, you can install that instead.
A digital product key is transmitted to your PC, so you won't need or receive a printed product key. You activate Microsoft 365 by signing in with a Microsoft account. If we detect your Microsoft account, we'll show it on this screen. After you sign in, your product is added to your Microsoft account, so that you can reinstall it later, or manage your new subscription, without a product key.
If you bought Office Professional Plus, Visio Professional, or Project Professional through your employer's Microsoft Workplace Discount Program (formerly known as Microsoft Home Use Program) benefit, select I don't want to sign in or create an account (at the bottom of the screen) and enter your product key.
If you bought a new Microsoft 365 product key card, or you received a product key when you bought Microsoft 365through an online store, go to Office.com/setup or Microsoft365.com/setup and follow the on-screen prompts. This is a one-time process that adds your new product to your Microsoft account. After you redeem your key, you can install Office.
If Microsoft 365 can't activate, it eventually becomes unlicensed and all editing features of Microsoft 365 are disabled. Microsoft can become unlicensed for a number of reasons. For example, if your Microsoft 365 subscription expires, you must renew your subscription to restore all features of Microsoft 365.
This article provides step-by-step instructions on how to activate Office for Mac. If you're running into errors or issues with installing or activating Office on your Mac, see What to try if you can't install or activate Office for Mac instead.
For Microsoft 365 for Mac, you can have up to 25 licenses associated with the same Microsoft account: only one license for a Microsoft 365 subscription and multiple one-time-use installs of Microsoft 365 for Mac Home and Student or Home and Business.
If you try to activate a one-time install of Microsoft 365 for Mac and you get the error: Key already used, you will need to select another license to use. Click Cancel and you'll return to the license selection screen.
Step 2: Sign in with your Microsoft account, or create one if you don't have one (you can create one with any existing email address you already have). Be sure to remember this account so that you can install or reinstall Office later, without a product key.
Open Internet Explorer. From the Settings (gear) menu, select Internet Options/Privacy Tab/Settings Advanced Button. Notice that the Third-party cookies radio button says "Accept"? Click "Block", Click "Accept" and then Ok, Ok your way out. Yes, you are setting it right back to where it started! Each user needs to do this separately.
As similarly answered by Danny adding *.
microsoftonline.com to the trusted sites in Internet Options fixes this issue. I know some others are reporting this doesn't work but it works for me with Server 2016. The correct entry can be discovered by using the nirsoft dnsquerysniffer during the office 365 login process. Here's some PowerShell to create a registry entry. The nice part about this registry entry is that it seems to fix this issue for all users.
Set HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3\1A10 to 1. Note you will have to do this for each user so this may be a good solution for those of you who can control user registry properties through group policy or other means.
I was able to reproduce the problem by checking "Enable protected Mode". Once checked, even if I unchecked it, the problem persisted until I repeated the radio button reset for third party cookies. This means that the order of operation matters for these two actions. Resetting your security/Internet options to "Default level" enables protected mode, and so will recreate this problem until protected mode is unchecked and the radio button reset.
and also on my internet explorer > tools > internet options
security tab: internet (uncheck - Enable Protected Mode ...)
privacy tab: settings bar to Medium and then click on 'sites' and add the above list of sites. Thats it. good luck.
I wasn't able to login to Windows 365 with this same problem. Searched for online answers, messed around with every setting, but I finally fixed it today! I had enabled third party cookies and everything, but just figured out what was still not working. This may not help everyone, but I:
1) switched my default to internet explorer2) In explorer, I clicked on settings, privacy, sites3) In the list of sites, I realized "
live.com" was set to "blocked", which made it impossible for office to communicate. At some point had added it, but meant to allow rather than block.4) Opened an office program, and was finally able to sign in.
Shared computer activation is required for scenarios where multiple users share the same computer and the users are logging in with their own account. Normally, users can install and activate Microsoft 365 Apps only on a limited number of devices, such as 5 PCs. Using Microsoft 365 Apps with shared computer activation enabled doesn't count against that limit. If your users have their own computers and no one else uses those computers, use product key activation for Microsoft 365 Apps.
To activate Microsoft 365 Apps, TLS 1.2 must be enabled by default on the operating system. Some older operating systems, such as Windows 7 Service Pack 1 (SP1) and Windows Server 2012, need an update applied to enable TLS 1.2 by default. For more information, see Update to enable TLS 1.1 and TLS 1.2 as default secure protocols in WinHTTP in Windows. But, running Microsoft 365 Apps on these older operating systems isn't supported. For more information, see End of support resources for Office.
To use shared computer activation, you need an Office 365 (or Microsoft 365) plan that includes Microsoft 365 Apps and also supports shared computer activation. Shared computer activation is available for the following plans:
When you're using the Office Customization Tool at
config.office.com or the wizard built into Microsoft Configuration Manager, make sure that you enable the option Shared Computer in the Product activation section.
If Microsoft 365 Apps is already installed and you want to enable shared computer activation, there are three options to choose from. A reinstallation isn't required. The device must be rebooted in order to apply the change.
Use Group Policy by downloading the most current Administrative Template files (ADMX/ADML) for Office and enable the "Use shared computer activation" policy. This policy is found under Computer Configuration\Policies\Administrative Templates\Microsoft Office 2016 (Machine)\Licensing Settings.
The Support and Recovery Assistant fully automates all of the steps to verify requirements for shared computer activation and to enable shared computer activation. It's available in two versions: enterprise and UI. Use the version that's best suited for your situation.
The Enterprise version of the Microsoft Support and Recovery Assistant is a command-line version. This version supports scripting for managing multiple devices, including those devices not immediately accessible. Download the Enterprise version.
To determine whether the user is licensed to use Microsoft 365 Apps, the Office Licensing Service has to know the user's account for Office 365. In some cases, Microsoft 365 Apps prompts the user to provide the information. For example, the user might see the Activate Office dialog box.
If your environment synchronizes Office 365 (Microsoft Entra ID) and local Active Directory (AD) accounts, users are unlikely to encounter any prompts. Microsoft 365 Apps can automatically retrieve the necessary information about the user's account in Office 365.
These steps are repeated for each user who signs in the shared computer. Each user gets a unique licensing token. Just because one user activates Microsoft 365 Apps on the computer doesn't mean Microsoft 365 Apps is activated for all other users who sign in the computer.
Licensing token renewal The licensing token that is stored on the shared computer is valid only for 30 days. As the expiration date for the licensing token nears, Microsoft 365 Apps automatically attempts to renew the licensing token when the user is logged on to the computer and using Microsoft 365 Apps.
If the user doesn't sign in the shared computer for 30 days, the licensing token can expire. The next time that the user tries to use Microsoft 365 Apps, Microsoft 365 Apps contacts the Office Licensing Service on the internet to get a new licensing token.
Internet connectivity Because the shared computer has to contact the Office Licensing Service on the internet to obtain or renew a licensing token, reliable connectivity between the shared computer and the internet is necessary.
Reduced functionality mode If the user isn't licensed for Microsoft 365 Apps, or if the user closed the Activate Office dialog box, no licensing token is obtained and Microsoft 365 Apps isn't activated. Microsoft 365 Apps is now in reduced functionality mode. In this mode the user can view and print Office documents, but can't create or edit documents. The user also sees a message in the Office program that most features are turned off.
Activation limits Normally, users can install and activate Microsoft 365 Apps only on a limited number of devices, such as 5 PCs. Using Microsoft 365 Apps with shared computer activation enabled doesn't count against that limit.
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