Julia Furkulitsa is an email expert with in-depth knowledge of inbox management, email apps, and everyday email tasks. She brings deep expertise built on years of focused work in the email space. Faulty hard drives custom led signage or disk errors can corrupt the Outlook data stored locally. This creates crashes that seem random—until you dig into the hardware logs. Outlook slows down, crashes randomly, or fails to load entirely. Users often turn to Microsoft’s ScanPST tool, but it struggles with large files and doesn’t always finish the job.

Sometimes you’ll open Outlook and then for no apparent reason, it will freeze or shut itself down. There are quite a few different causes for this, but one of the most common is a defective add-in. Here’s how to disable add-ins in Outlook even when it keeps crashing. Corrupted or badly set-up Outlook profiles can often cause start-up problems. The app might refuse to launch or crash at the splash screen. However, like any software, Outlook isn’t immune to issues.

Unable to add a calendar

It warns that once you pass certain limits such as the number of folders or messages, performance can nosedive. Sometimes, antivirus real-time scanning can slow Outlook down. Configure your antivirus software to exclude Outlook files or processes from real-time scans to avoid interference.

Step 2 - Follow these instructions to install your Office application. Step 1 - Follow these instructions to uninstall your Office applications. We love reading your suggestions on new features and feedback about how you use our products! To learn more about how to share your feedback, see How do I give feedback on Microsoft Office. Post questions, follow discussions and share your knowledge in the Outlook.com Community.

• The maximum number of recipients for an individual email through USNH IT mail servers is 300.
• A more general version that can also fix Office, Microsoft 365, and other Outlook problems can be found here.
• For more information, go to Add or remove an email alias in Outlook.com.
• This alias will be added to their account as a secondary alias, with the original 3rd party alias will continue to be set up as the primary.
• It warns that once you pass certain limits such as the number of folders or messages, performance can nosedive.
• Switch your alias to an Outlook.com or Hotmail.com account.
• This issue has been fixed for Outlook.com country domains.

Repair your .pst file in classic Outlook

This alias will be added to their account as a secondary alias, with the original 3rd party alias will continue to be set up as the primary. Once this step is complete, the user will land in their Outlook inbox and be able to use all Outlook functionality with this new email address. Availability has recovered, and engineers are investigating the root cause and identifying problematic servers. The team is sweeping all remaining capacity to identify and address residual issues. Occasionally, classic Outlook tries to run a process in the background.

Outlook Running Slow

Most Outlook problems can be resolved with proper troubleshooting and maintenance. Following the fixes above will help you keep your Outlook running smoothly and protect your productivity. We hope this guide proves useful in resolving your Outlook problems efficiently.

Optimize Your Outlook Inbox with Clean Email

To check if you have received the fix, review your contact list to confirm duplicates have been removed. To help you get rid of these duplicates, we have released a fix which will automatically clean up your contact list. This fix will clean up duplicate contacts for end users starting August 9, 2023. Rollout of the fix to all users will take few weeks, so, some users may see the fix applied by the end of September. Add an Outlook.com alias to your account and send email to Gmail users using that alias.

Users may get errors or failures when trying to access Outlook.com

Auto-archive, sending 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. If so, wait a short time (usually two or three minutes) to see if Outlook starts working again. While these Microsoft accounts work in other Microsoft products (e.g. OneDrive, Windows, Xbox), they are non-functional when visiting Outlook.com.

Repair Office

The same steps can also be used to check your junk mail filters in the new version of the desktop email client for Windows. In many organizations, Outlook is one of the most common and core programs that are used from day to day. Many businesses depend on it to keep their operations running, and having it break is a nightmare that usually ends up costing lots of money and causing a lot of frustration. Fortunately, with the right Outlook troubleshooting strategies, many of the most common Outlook problems are quite straightforward to troubleshoot. Below, you will see some of the most common issues that users run into, and what the most efficient way to troubleshoot Outlook is.