Exchange Online, Outlook 2016 for Mac; In this article Symptoms. In Microsoft Outlook 2016 for Mac, you are repeatedly prompted for authentication while you're connected to your Office 365 account. This issue occurs because of the presence of duplicate tokens in the keychain. Start Keychain Access by using one of the following methods: Select the Finder application, click Utilities on the Go menu, and then double-click Keychain Access. In Spotlight Search, type Keychain Access, and then double-click Keychain Access in the search results. In the search field in Keychain Access, enter Exchange. 每次启动任何 Office 应用程序时，都会提示登录 Microsoft 帐户或 Office 365 商业版帐户。 登录 Office 应用程序后，会出现“身份验证会话已过期”错误消息。 按照这些说明，还原密钥链权限： 退出所有的Office for Mac应用，如 Word、Excel、PowerPoint.
After you or your Mac administrator resets the password of your macOS user account, your Mac might ask you to update your keychain password or enter the password of your login keychain. It might also tell you that the system was unable to unlock your login keychain. That's because your login keychain is still using your old password.
2017-7-14 Question: Q: how to turn off keychain pop ups. My computer won't accept any passwords I put into these keychain pop ups. So they constantly pop up and wont go away even if you click cancel 6 or 7 times. I had been trying to fix this issue for months on my mac. I just spoke to an apple rep and he helped me resolve this in less than a minute. Roll back to the latest stable patch of Outlook for Mac 2016. Uninstall Microsoft Office. Open Keychain Access (Finder Go Utilities Keychain Access). In Keychain Access, in the search field, enter 'Exchange'. In the search results, select each item to view the account that is listed at the top, then press the Delete key. Repeat this step.
If you don't know your old password
If you don't know your old password, the solution is to create a new login keychain.
If you know your old password
If you know your old password, use that password to update your existing login keychain:
- Open the Keychain Access app, which is in the the Utilities folder of your Applications folder.
- From the list of keychains on the left side of the window, select 'login.'
- From the Edit menu in the menu bar, choose “Change Password for Keychain 'login.'”
- Enter the old password of your user account in the Current Password field. This is the password you were using before the password was reset.
- Enter the new password of your user account in the New Password field. This is the password you're now using to log in to your Mac. Enter the same password in the Verify field.
- Click OK when done, then quit Keychain Access.
适用于：Office for Mac、Office 2019 for Mac、Office 2016 for MacApplies to:Office for Mac, Office 2019 for Mac, Office 2016 for Mac
若要在组织中使用 Office for Mac，就需要将其激活。Activation: To use Office for Mac, it needs to be activated.如何激活 Office for Mac 取决于组织拥有的是 Office 365 计划，还是批量许可协议。Where you download Office 2016 for Mac from depends on whether your organization has an Office 365 plan or has a volume license agreement.但在这两种情况下，用户都无需输入任何产品密钥。But in both cases your users won't have to enter any product keys.
备注
如果你是尝试激活 Office for Mac 个人副本的 Office 用户，请按照这些说明进行操作，而不是阅读本文。If you're an Office user trying to activate a personal copy of Office for Mac, follow these instructions instead of reading this article.
激活 Office 365 版本的 Office for MacActivate Office 365 versions of Office for Mac
如果你的组织拥有 Office 365 计划，请在将 Office for Mac 部署到用户之前确保为每个用户分配一个 Office 许可证。If your organization has an Office 365 plan, make sure you assign each user a license for Office before you deploy Office for Mac to your users.如果未向用户分配许可证，你仍然可以将 Office for Mac 部署到该用户，但用户将无法激活和使用 Office。If you don't assign a user a license, you can still deploy Office for Mac to that user, but the user won't be able to activate and use Office.
对于 Office 365 客户，Office for Mac 可通过联系 Internet 上的 Office 许可服务来激活。For Office 365 customers, Office for Mac activates by contacting the Office Licensing Service on the internet.Office 许可服务可跟踪已授权的用户和已经安装 Office 的计算机数量。The Office Licensing Service, a part of Office 365, keeps track of which users are licensed and how many computers they've installed Office on.
部署 Office for Mac 后，系统会在用户首次使用时提示他们激活 Office。After you deploy Office for Mac, your users are prompted to activate Office the first time they use it.在用户激活 Office 时，确保他们已连接到 Internet。Make sure users are connected to the internet when they activate Office.
在“登录以激活 Office”屏幕上，用户应选择“登录”，然后输入其电子邮件地址和密码。On the Sign in to Activate Office screen, users should select Sign In, and then enter their email address and password.登录之后，用户能会看到一条提醒，请求提供权限来访问存储在密钥链中的 Microsoft 身份。After you sign in, you may see an alert asking for permission to access the Microsoft identity stored in your keychain.用户应选择“允许”或“始终允许”以继续。They should select Allow or Always Allow to continue.
尽管你可以为用户部署 Office for Mac，但用户需要自己登录并激活 Office for Mac。While you can deploy Office for Mac for your users, your users need to sign in and activate Office for Mac for themselves.这是为了确保 Office 许可服务将 Office for Mac 与正确的许可用户正确关联。That's to ensure that the Office Licensing Service properly associates Office for Mac with the correct licensed user.
Mac 上的一个程序（Office365ServiceV2 守护进程）会每天运行一次，检查用户的订阅状态。A program on the Mac, the Office365ServiceV2 daemon, runs once a day to check the user's subscription status.计算机必须连接到 Internet 才能联系 Office 许可服务。The computer must be connected to the internet to contact the Office Licensing Service.如果计算机在 9 天后无法联系 Office 许可服务，用户在应用中工作时将看到一条警告消息。If the computer can't contact the Office Licensing Service after nine days, the user sees a warning message when working in an app.
如果计算机在 30 天后无法联系 Office 许可服务，Office 将进入缩减功能模式。If the computer can't contact the Office Licensing Service after 30 days, Office goes into reduced functionality mode.这意味着用户可以在 Office 应用中打开、查看和打印现有文档，但无法创建或编辑文档。This means that the user can open, view, and print existing documents in an Office app, but can't create or edit documents.用户还会在应用中看到指出大多数功能不可用的消息。The user also sees a message in the app that most features aren't available.在用户连接 Internet 并且订阅状态经过验证之后，Office 的所有功能即可恢复使用。After the user connects to the internet and the subscription status is verified, all the features of Office are available again.
对于在 Office 365 中为其分配了许可证的每个用户，你可以在该用户的最多 5 台 Mac 上部署和激活 Office for Mac。For each user that you've assigned a license to in Office 365, you can deploy and activate Office for Mac on up to five Macs for the user.如果需要在用户的第 6 台计算机上提供 Office for Mac，则需要先停用现有安装。If you need to provide Office for Mac on a sixth computer for a user, you need to deactivate an existing installation first.停用安装不会从计算机中删除 Office for Mac。Deactivating an installation doesn't remove Office for Mac from the computer.作为替代，安装将进入缩减功能模式。Instead, the installation goes into reduced functionality mode.
Microsoft Mac Keychain Software
用户可登录到 Office 365 门户，通过转到“我的帐户” > “安装状态” > “管理安装”来停用现有安装。Users can sign into the Office 365 portal to deactivate an existing installation by going to My account > Install status > Manage installs.或者，你可以采用 Office 365 管理员身份停用安装。Or, you can deactivate an installation as an Office 365 administrator.登录到 Office 365 门户，转到“管理中心”，然后转到“用户” > “活跃用户”。Sign into the Office 365 portal, go to the admin center, and then go to Users > Active Users.选择用户，然后为用户的“Office 安装”属性选择“编辑”。Select the user, and then choose Edit for the Office installs property of the user.
激活 Office for Mac 的批量许可版本Activate volume licensed versions of Office for Mac
若要激活 Office 2019 for Mac 或 Office 2016 for Mac 的批量许可版本，请使用批量许可证 (VL) 序列化程序。To activate a volume licensed version of Office 2019 for Mac or Office 2016 for Mac, use the Volume License (VL) Serializer.可通过登录到批量许可服务中心 (VLSC)来下载 VL 序列化程序。You can download the VL Serializer by signing into the Volume Licensing Service Center (VLSC).在每台计算机上运行 VL 序列化程序。You run the VL Serializer on each computer.执行此操作后，用户首次打开 Office 2019 for Mac 或 Office 2016 for Mac 时将不会看到任何激活提示。By doing this, your users won't see any activation prompts when they first open Office 2019 for Mac or Office 2016 for Mac.
Open Internet Plug-Ins and delete all Sharepoint files. Please keep in mind that all users have their own library as well. Return to the library and open LaunchDaemons. Navigate to the system library. 
有关详细信息，请参阅批量许可证 (VL) 序列化程序概述。For more information, see Overview of the Volume License (VL) Serializer.