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- How to find Outlook temp files on a Mac with macOS or Mac OS X When Outlook is trying to preview folders with encrypted emails, this issue pops up and causes your Outlook to freeze and not respond. Most of the times, Microsoft Office folks release updates that can handle this problem and other Outlook issues.
- We have white listed all the domains and IPs for 365 Exchange. I do agree about Windows 8.1, however if this is an IPV6 issue are there any suggestions for what we can check? So far 15 out of our 42 active Windows Outlook users have been impacted (not counting Mac Outlook, or holiday users). Still the problem continues.
Outlook for Microsoft 365 for Mac Office for business Office 365 Small Business Outlook 2016 for Mac Outlook 2019 for Mac More. For steps on how to use these settings to set up an initial IMAP account or to add more accounts in the Outlook for Mac Accounts box, see Add an email account to Outlook. Scenario: I have an Office 365 account with the email [email protected] I have an old MSA account with the email [email protected] Windows 10 - Creators Update (but tried this with a fully patched version immediately before updating to Creators Update Outlook 2016 latest (installed from Office 365 In t.
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 setting on the Security tab of the Microsoft Exchange dialog box is set to a value other than Anonymous Authentication.
Resolution
Note
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,it is highly recommended 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.
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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:
- Exit Outlook.
- 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.
- In Control Panel, locate and double-click Mail.
- Click Show Profiles, select your Outlook profile, and then click Properties.
- Click E-mail Accounts.
- Select your email account, and then click Change.
- In the Change Account dialog box, click More Settings.
- In the Microsoft Exchange dialog box, select the Security tab.
- On the Logon network security list, select Anonymous Authentication, and then click OK.
- Click Next, click Finish, and then click Close on the Account Settings dialog box.
- 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. 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.
- Open the Registry Editor.
- 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.
- Locate the registry path appropriate for your version of Outlook:
- For Outlook 2013HKEY_CURRENT_USERSoftwareMicrosoftOffice15.0OutlookProfiles
- For Outlook 2010 and 2007HKEY_CURRENT_USERSoftwareMicrosoftWindows NTCurrentVersionWindows Messaging SubsystemProfiles
- Under this subkey, locate and expand the name of your Outlook profile.
- Under the profile, locate and expand the 9375CFF0413111d3B88A00104B2A6676 key.
- 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 **[email protected]** under the 00000003 subkey.
- Under the 0000000x subkey, locate the Service UID binary value. It represents a GUID (for example, c3 d1 9a 7b 80 1b c4 4a 96 0a e5 b6 3b f9 7c 7e).
- Locate the subfolder in your profile that matches the GUID value identified in step 6 (for example, c3d19a7b801bc44a960ae5b63bf97c7e).
- Under the subfolder 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).
- Locate the subfolder in your profile that matches the GUID value identified in step 8 (for example, 5fcfd5f1ba5c6f45b357cc5e0d169458).
- Under the subkey found in step 9, examine the value of the 00036619 binary value. This value determines whether Outlook is using Anonymous Authentication.Binary: 00036619Data: 01 f0 00 80Anonymous AuthenticationAny other value represents an authentication method other than Anonymous.
Outlook is a personal information manager from Microsoft. It is widely used as an email client application but has various smart integrated features such as calendar, task management, contact management, add-ins and many more.
Quite often many users report that they are facing issues with Microsoft Outlook, no matter if it was the latest installation or an old one. Like any other application, Outlook also has some issues and bugs of which some are known and have been fixed while there may be some which have not received required attention yet.
One of the known common issues with Outlook is that it closes unexpectedly sometimes.
There are various issues which can be encountered by any Outlook user while working or just after opening the application itself such as Outlook has stopped working, crashing on startup, crashing in safe mode, Outlook not responding, Outlook crashing while sending emails or loading profile, and crashes because of rundll32 / olmapi32.dll / kernelbase.dll / wwlib.dll / ntdll.dll.
Though there could be many reasons behind why Outlook crashes or why it is crashing on your PC, in this article, we’ll walk you through a couple of issues and the outright solution of each issue respectively.
Why might Outlook be Closing Unexpectedly?
There are many possible reasons for this issue, and we have listed down a few of the common ones below:
- Corruption of Outlook PST iles
- Virus or malware Infection
- Incorrect Windows registry file
- Compatibility issues
- Crashes while trying to upgrade to the latest version
- Too many Add-ins can cause Outlook crash
Uninstall Microsoft Office 2016 & install again
If your Outlook installation is a part of Microsoft’s Office suite and you face crashing issues or encounter Outlook has stopped working message, uninstalling Office 2016 & reinstalling it again might solve the issue. Doing this has helped many users follow the steps below:
- Go to Control Panel, and click on Programs and Features.
- Select Microsoft Office, right-click, and click Uninstall.
- Once Office uninstallation is complete, install it again and check if the issue still exists.
Check your Security Software
System Security tools and software like McAfee, Avast, Avira, etc. Cause issues with Outlook due to some specific settings which you’ve set as per your preference or came enabled by default.
Try disabling the security software/antivirus tool temporarily and check if it helps or not; in most of the cases it turns out that the Security / Antivirus tool was the sole reason causing the tool from working. In case if the issue is fixed, you can uninstall antivirus/security software then.
Remove Outlook accounts and add again
For some cases, the issue might be with your Outlook emails accounts, and there is no way to confirm it straight. As, if the problem is with Outlook data file (OST or PST) then the file won’t remain accessible due to corruption or specific damage to the file structure and integrity.
Uninstall Outlook 365 On Mac
Removing all your Outlook mail accounts may solve the problem; follow the steps below to do so:
- Press + S key, type Control Panel, and press Enter.
- Select Mail (Microsoft Outlook 2016) and click on Email Accounts..
- Now here, select and remove Outlook accounts one-by-one.
- Restart PC and add the accounts again and check if the issues are gone or not.
Disable Hardware Acceleration Functionality
Hardware acceleration is often used by most of the newest applications for Windows. To enhance the overall experience of Outlook, disabling the option of Hardware Acceleration available in the application would come to be a savior.
Follow the steps below for disabling hardware acceleration:
- Launch Outlook.
- Click on File tab > click Options.
- Click Advanced, check Disable Hardware graphics acceleration and click OK.
- For the change to take effect, close the application and start Outlook again.
Disable All Outlook Add-ins
If you have installed Add-ins in Outlook to bring the extra features and functionality to boost the productivity and workflow, then you might need to disable all the Outlook Add-ins currently installed. For most of the Outlook users, this is found as a common issue existed amongst all.
Follow the steps below to disable Outlook Add-ins:
- Open Outlook.
- Click on File tab, click Options, and select Add-ins.
- In the new sub-menu windows, click Go, deselect all the active Add-ins, and click OK.
- Now,
close Outlook and restart it and check if the issues are solved .
If Outlook doesn’t start at all, try launching it in Safe Mode; follow the below steps:
Press and hold CTRL and run Outlook, this combination will trigger the command for Outlook to open in Safe Mode. Many users commonly report Kaspersky Anti-Spam add-on as causing the issue, and so disabling it solved the issue for them.
Disable Host IPS on MacAfee Antivirus Software
If MacAfee Antivirus software is installed on your system, then you should know that some of its features may cause crash problems. Below are the steps to follow to fix this issue:
- Right-click MacAfee antivirus software icon present in the system tray on your Windows machine.
- Right-click MacAfee antivirus software icon present in the system tray on your Windows machine.
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It might bother you, but you have to repeat this process every time you start your Windows machine. This solution has been working successfully for most of the users.
Above concerns are the most common which are talked amongst many Outlook users and hopefully, by following the respective steps you would be able to fix the issues.
Kernel for Outlook PST Repair
Outlook PST Repair tool by Kernel is a professional tool that resolves problems or concerns regarding Outlook PST data file.
You can use this tool to migrate from the Outlook email client to different email clients with ease of accessibility and simplicity of operations. Also, with the tool, you can repair the corrupt or damaged Outlook PST file and recover data with the same file structure and folder hierarchy as of the original file.
Conclusion
Office 365 Keeps Disconnecting To Outlook 2016 For Macbook Pro
Above listed are the issues which came to be the most common, which are encountered by many Microsoft Outlook users, and because of these issues, Outlook was closing unexpectedly. There was no loss of data due to these problems, but it was certainly a headache, and we’ve addressed all of the above problems with the most appropriate solutions.