08.04.2020

Microsoft Outlook Mac Stuck In Loop

Outlook won’t open or is stuck at loading profile. Last Updated: June 26, 2019. After updating to Monthly Channel Version 1905 (Build 6) and higher, Outlook may hang at loading profile or won't start. Jan 16, 2019 This issue occurs because Outlook 2016 for Mac can't locate and use the Sent Items folder. The folder hierarchy in the mailbox may have become corrupted. For example, in some cases, the Sent Items folder may be converted into the Archive folder, and the icons that mark the two folders are incorrect. Ahhh microsoft, you have done it again! For mac users, go to toolsaccounts and under server information be sure that the user name is your complete email address. Then close and restart Outlook. This worked for me, after much frustration with popups repeatedly telling me that i.

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Symptoms

When you try to create an Outlook profile or connect to a Microsoft Office 365 mailbox, you're continually prompted for credentials while the client displays a 'trying to connect..' message. If you cancel the credentials prompt, you receive the following error message:

The connection to Microsoft Exchange is unavailable. Outlook must be online or connected to complete this action.

Cause

This issue can occur if the Logon network security settingon the Security tab of the Microsoft Exchange dialog box is set to a value other than Anonymous Authentication.

Resolution

Note

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Microsoft Outlook 2016 and some recent builds of Outlook 2013 are not affected by this issue. Those versions have been updated to prevent the problem that is described in the 'Symptoms' section. These versions have the Logon network security setting disabled or removed from the Microsoft Exchange email account settings.

For newer versions of Outlook

You may be an Office 365 customer who is experiencing the error that is described in the 'Symptoms' section when you try to connect to an Exchange Online mailbox. You may also already be running newer versions of Outlook 2013 or Outlook 2016. If both conditions are true, we highly recommend that you use the Outlook keeps asking for my password diagnostic to troubleshoot issues in which Outlook continually prompts for a password.

This diagnostic does automated checks and returns possible solutions for you to use to try to fix any detected issues.

If you are connecting to an Exchange On-Premises mailbox, see the following articles for additional troubleshooting:

Additionally, you can view the following forum thread for common causes:

For affected versions of Outlook

If you have an older version of Outlook, change the Logon network security setting to Anonymous Authentication to fix this issue. To do this, follow these steps:

  1. Exit Outlook.

  2. Open Control Panel, and then do one of the following:

    • In Windows 10, Windows 8.1, or Windows 7, click Start, type control panel in the search box, and then press Enter.
    • In Windows 8, swipe in from the right side to open the charms, tap or click Search, and then type control panel in the search box. Or, type control panel at the Start screen, and then tap or click Control Panel in the search results.

  3. In Control Panel, locate and double-click Mail.

  4. Click Show Profiles, select your Outlook profile, and then click Properties.

  5. Click E-mail Accounts.

  6. Select your email account, and then click Change.

  7. In the Change Account dialog box, click More Settings.

  8. In the Microsoft Exchange dialog box, select the Security tab.

  9. On the Login network security list, select Anonymous Authentication, and then click OK.

  10. Click Next, click Finish, and then click Close on the Account Settings dialog box.

  11. Click Close on the Mail Setup dialog box, and then click OK to close the Mail control panel.

More Information

To locate and view the registry setting for Anonymous Authentication in the Outlook profile, follow these steps.

Important

Modifying the Outlook profile by using the 'Profiles' registry path is not supported and may cause your Outlook profile to be in an unsupported state.

Important Microsoft office for mac 2019 login with no office365.

Follow the steps in this section carefully. Serious problems might occur if you modify the registry incorrectly. Before you access it, back up the registry for restoration in case problems occur.

  1. Open Registry Editor. To do this, do one of the following:

    • In Windows 10, Windows 8.1, or Windows 8, press the Windows logo key+R to open the Run dialog box, type regedit.exe, and then click OK.
    • In Windows 7, click Start, type regedit in the Start Search box, and then press Enter. If you're prompted for an administrator password or for confirmation, type the password, or click Allow.

  2. Locate the following registry path, as appropriate for your version of Outlook:

    • For Outlook 2013

      HKEY_CURRENT_USERSoftwareMicrosoftOffice15.0OutlookProfiles

    • For Outlook 2010 and 2007

      HKEY_CURRENT_USERSoftwareMicrosoftWindows NTCurrentVersionWindows Messaging SubsystemProfiles

  3. Under this subkey, locate and expand the name of your Outlook profile.

  4. Under the profile, locate and expand the 9375CFF0413111d3B88A00104B2A6676 key.

  5. Under the 9375CFF0413111d3B88A00104B2A6676 key, you see a subkey for each account in your profile. Select the first subfolder (00000001), and then examine the data of the Account Name binary value by double-clicking the value. Repeat this process until you find the Account Name value that includes your SMTP address. For example, the Account Name value points to **guidopica@contoso.com** under the 00000003 subkey.

  6. Under the 0000000x subkey, locate the Service UID binary value. It represent a GUID (for example, c3 d1 9a 7b 80 1b c4 4a 96 0a e5 b6 3b f9 7c 7e).

  7. Locate the subfolder in your profile that matches the GUID value that's identified in step 6 (for example, c3d19a7b801bc44a960ae5b63bf97c7e).

  8. Under the subkey that you found in step 7, examine the 01023d0d binary value. It represents a GUID (for example, 5f cf d5 f1 ba 5c 6f 45 b3 57 cc 5e 0d 16 94 58).

  9. Locate the subfolder in your profile that matches the GUID value that's identified in step 8 (for example, 5fcfd5f1ba5c6f45b357cc5e0d169458).

  10. Under the subkey that's found in step 9, examine the value of the 00036619 binary value. This value determines whether Outlook is using Anonymous Authentication.

    Binary: 00036619

    Data: 01 f0 00 80Anonymous Authentication

    Any other value represents an authentication method other than Anonymous.

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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.

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:

Workaround

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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.

Outlook On Mac

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These steps affect all Office applications that use modern authentication.

Microsoft Outlook Mac Stuck In Loop Drive

  1. Quit Outlook and all other Office applications.

  2. 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.

  3. In the search field in Keychain Access, enter Exchange.

  4. 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.

  5. In the search field, enter adal.

  6. Select all items whose type is MicrosoftOffice15_2_Data:ADAL:<GUID>, and then press Delete.

  7. In the search field, enter office.

  8. Select the items that are named Microsoft Office Identities Cache 2 and Microsoft Office Identities Settings 2, and then press Delete.

  9. Quit Keychain Access.

    Note

    When you start Outlook, you are prompted to authenticate.