Outlook has suddenly stopped working. Outlook 2011 for Mac application won’t launch or start. Splash screen comes up and then disappears again.Then the program quit.
Solution 1:- (Rebuild Outlook database)
Method 1: Press and hold Option key when launching Outlook to rebuild the identity.
Method 2: Press and hold Alt key (windows) and click the Outlook icon on on the Dock (If the icon not appears on dock, Go to /Applications/Microsoft Office 2011 folder and drag the outlook file to Dock).
Microsoft database utility will appear. Now click the Rebuild button.
It will reboot Outlook database. After it finished the process, click the Done button and close the Microsoft Database utility.
Method 3: Open Applications and choose Microsoft Office 2011 folder. Then select the office folder and find Microsoft Database Utility.app. Here you can find rebuild option.
Solution 2:- (Remove Outlook preference file)
Go to ~/Library/Preferences and delete Outlook preference file (file name starts with “com.microsoft”).
Solution 3: (Nano suggested)
Open Terminal app and type the following command to delete old preferences.
Solution 1:- (Rebuild Outlook database)
Method 1: Press and hold Option key when launching Outlook to rebuild the identity.
Method 2: Press and hold Alt key (windows) and click the Outlook icon on on the Dock (If the icon not appears on dock, Go to /Applications/Microsoft Office 2011 folder and drag the outlook file to Dock).
Microsoft database utility will appear. Now click the Rebuild button.
It will reboot Outlook database. After it finished the process, click the Done button and close the Microsoft Database utility.
Method 3: Open Applications and choose Microsoft Office 2011 folder. Then select the office folder and find Microsoft Database Utility.app. Here you can find rebuild option.
Solution 2:- (Remove Outlook preference file)
Go to ~/Library/Preferences and delete Outlook preference file (file name starts with “com.microsoft”).
Solution 3: (Nano suggested)
Open Terminal app and type the following command to delete old preferences.
- New Outlook For Mac
- Outlook On Mac
- Microsoft Outlook Won T Open
- Microsoft Outlook Mac Osx
- Microsoft Outlook For Mac Updates
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Next type or paste the following command to kill the cached preferences.
Then launch Microsoft Outlook.
If the above methods doesn’t work, re-install office 2011 software.
-->If the above methods doesn’t work, re-install office 2011 software.
Symptoms
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.
New Outlook For Mac
Outlook On Mac
Resolution
Microsoft Outlook Won T Open
To resolve this issue in Outlook 2016 for Mac, install the February 2017 Outlook update (version 15.31.0) from the following Office website:
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 Mac Osx
Note
These steps affect all Office applications that use modern authentication.
Microsoft Outlook For Mac Updates
- 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.
- 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.