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After installing the September Public Update, Outlook 2007 displays mixed languages in the user interface. Here are some common fixes that should work when Outlook doesn't open, whether you're using Windows or a Mac. To manage your mailbox by Microsoft Outlook Email Repair Tool Online using the AutoArchive feature, see AutoArchive settings explained.

• As your mailbox size increases, more resources are required to open each folder.
• Here are some common fixes that should work when Outlook doesn't open, whether you're using Windows or a Mac.
• For more information about when builds are available for their respective channels, go to Update history for Microsoft 365.
• If you typically use an Outlook.com account for email, this issue can occur if there are multiple aliases on the account and the 3rd party email address is the primary alias.
• To determine whether this problem is caused by a corrupted user profile, create a user profile to see whether the problem still occurs when you use the new profile.

Outlook known issues in the May 2019 updates

Or, you can disable any antivirus software add-ins that are installed in Outlook. If you have email messages in an email program, you must import your email messages and addresses to the new user profile before you delete the old profile. If everything is working correctly, you can now delete the old profile. In System Configuration, if you select a check box, the related service or startup program runs when you restart the computer.

Outlook Known issues in July 2022 updates

You must have at least three user accounts on the computer to complete these steps. You can automatically repair your Office program files to resolve such problems as Outlook freezing or not responding. Occasionally, classic Outlook tries to run a process in the background. Auto-archive, sending FixTechGuide mailbox repair steps and receiving a very large attachment, or running some of the other mailbox tools can all be done in the background. Check the status bar at the bottom of the screen to see if another process is running.

Outlook known issues in the December 2018 updates

We recommend that you move several items in your larger folders to separate folders, or that you archive those items by using the AutoArchive feature. These steps are provided in a specific order based on commonality and complexity. Find solutions to common problems or get help from a support agent. The folder may have been deleted or the server where the folder is stored may be unavailable.

Outlook Known issues in September 2020 updates

If you use the cloud-based Microsoft 365 on a PC or Mac, the automated Support and Recovery Assistant tool can diagnose and fix many issues, including Microsoft Outlook not starting. You may have to contact your antivirus software vendor to determine how to configure the software to exclude any integration with Outlook or to exclude scanning in Outlook. For a list of antivirus software vendors, see Consumer antivirus software providers for Windows.

Outlook known issues in the June 2017 security updates

To install the latest Windows and Office updates, click the link below. You can also add the secondary connected accounts (Gmail, Yahoo, etc.) in Outlook.com as additional accounts in the Outlook profile. Your user profile is a collection of settings that let you customize the computer appearance and performance. It contains settings for desktop backgrounds, screen savers, sound settings, and other features.



Outlook stores certain data, such as email signatures and the spelling checker dictionary, in the AppData folder. If the network is performing slowly, Outlook must wait for read and write operations to the AppData directory to finish. To manage your mailbox by reducing the size of the Outlook data file, see Reduce the size of Outlook Data Files (.pst and .ost). Although add-ins can enhance your user experience, they can Outlook Login Issues Troubleshooting occasionally interfere or conflict with Outlook.