Microsoft Outlook - how do I download the app on PC? If you want to download the software on your pc or mac, you could either first visit the Mac store or Windows AppStore and search for the app OR you can easily use any of the download links we provided above under the 'Download and Install' header section to download the application. Update Outlook for Mac to be latest for better using experience. Click Help Check for Updates at the top menu. Clear Outlook cache to let it run at refresh state. Make sure you quit Outlook and other Office apps. Go to KeyChain Access.
-->Symptoms
Microsoft Outlook App For Macbook
In Microsoft Outlook 2016 for Mac, you are repeatedly prompted for authentication while you're connected to your Office 365 account.
Cause
This issue occurs because of the presence of duplicate tokens in the keychain.
Resolution
To resolve this issue in Outlook 2016 for Mac, install the February 2017 Outlook update (version 15.31.0) from the following Office website:
![Mac Mac](https://cdn.macworld.co.uk/cmsdata/reviews/3611212/mail-versus-outlook-for-ios_thumb800.jpg)
Workaround
To work around this issue, delete any cached passwords for your account, and also delete any modern authentication tokens from the keychain. To do this, follow these steps.
Microsoft Outlook App Mac
![Microsoft Outlook App Macbook Microsoft Outlook App Macbook](https://images.techhive.com/images/article/2014/10/01-mail-all-retina-100528201-orig.png)
Note
These steps affect all Office applications that use modern authentication.
- Quit Outlook and all other Office applications.
- 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.
- In the search results, select each item to view the Account that's listed at the top, and then press Delete. Repeat this step to delete all items for your Exchange account. Open source video software.
- In the search field, enter adal.
- Select all items whose type is MicrosoftOffice15_2_Data:ADAL:<GUID>, and then press Delete.
- In the search field, enter office.
- Select the items that are named Microsoft Office Identities Cache 2 and Microsoft Office Identities Settings 2, and then press Delete.
- Quit Keychain Access.NoteWhen you start Outlook, you are prompted to authenticate.