1 Troubleshoot Outlook for Windows issues
Deandre Love edited this page 2025-11-03 23:08:46 +08:00
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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. For more information, go to Add or remove an email alias in Outlook.com. If you're still unable to send or receive email, read how to Fix Outlook.com email sync issues. Some customers may experience a delay when trying to create a new email address, or alias, for their Outlook.com account. If you're having problems sending Outlook not opening on Windows 10 or receiving email, read how to Fix Outlook.com email sync issues.

Start classic Outlook in safe modeIn Windows 10, click Start.Type Outlook /safe, in the Search programs and files and then click OK.Close and re-open Outlook.If the issue is resolved, you can keep working, or if you have time, take the following steps to find out what COM Add-in is causing the problem.

While attempting, the damaged program or an out-of-date can cause this error. You can sort out this issue with the help of some common configurational changes. There is currently no option to revert to the prior behavior, but we would love to hear your feedback to help us with future designs. To learn more about how to send us feedback, please see How do I give feedback on Microsoft Office. You may Outlook not opening on Windows 10 notice that All, Unread , Mentioned and other sort and filtering options, such as By date, and Newest are missing in Outlook above your email list. Please install the Windows 10 Fall Creators Update to fix this issue.

If you manually type in the secondary connected account email address in the "From" field, the email is sent as "On behalf of" your primary Outlook.com account. A software rollout over the weekend was deployed incompletely, causing one component to send a high volume of messages to another component that had been deleted, overwhelming the routing plane servers. Availability has recovered, and engineers are investigating the root cause and identifying Outlook not opening on Windows 10 problematic servers. The team is sweeping all remaining capacity to identify and address residual issues. Get Help has troubleshooters for classic Outlook for Windows you can run for many common scenarios, such as Outlook startup or profile setup problems. These often help resolve issues without the need to contact support.

If creating a new profile solves your issue, you can return to the Show Profiles dialog and delete your old profile. If you try to delete or move a large number of messages at once, Outlook can appear to freeze, but really, it's working behind the scenes. If Outlook is performing some operation on hundreds or thousands of messages at once, it might appear to be stuck. Give Outlook a few minutes to finish the process and it should start to work again. If Outlook isn't stuck at a screen that says "Processing," or this didn't resolve your issue, continue to the steps below. Use the classic Outlook startup troubleshooter to diagnose and fix several common classic Outlook for Windows issues for you.

Usually, this type of error shows some issues, errors, or glitches on the local disk where your Microsoft Outlook PST files are located. You can effortlessly use some troubleshooting procedures to set up your local drive. You can manually increase the time span for establishing connectivity of your Outlook program to the server. Typically, a less server time-out period can throw various errors. Follow the instruction given below to change your server time-out settings. When you reinstall Outlook, you are removing the current application from your system and then installing it again.

To learn more about how to send us feedback, please see How do I give feedback on Microsoft Office. Another options is to use the Filter Email button on the ribbon. You may notice that All, Unread , Mentioned and other sort and filtering options, such as By date, and Newest are missing in Outlook above your email list. The loading of unregistered MAPI services has been Outlook not opening on Windows 10 disabled by default to make Outlook more secure. This occurs because custom form script is now disabled by default.

Should you decide to remove a profile, back up the data files first. All offline cached content will be deleted when you choose Remove. For more information, see Introduction to Outlook not opening on Windows 10 Outlook Data Files (.pst and .ost). A corrupted profile, a damaged PST file, faulty add-ins, or improper Outlook startup settings often cause this issue.

If you need to increase the number of this limit try the next resolution. Step 1 - The hard limit of recipients for a single email message is 300. Reduce the number of recipients for a single email to less than 300. Step 2 - Follow these instructions to install your Office application. Step 1 - Follow these instructions to uninstall your Office applications. If Outlook Desktop fails to connect, try these steps before escalating the issue to the ET&S Help Desk.

If you're having problems sending or receiving email, read how to Fix Outlook.com email sync issues. The maximum number of recipients for an individual email through USNH IT mail servers is 300. If you try to send to more than 300 recipients in a single send, you will get an error similar to "This message wasn't delivered to anyone because there are too many recipients. The limit is 300." No matter how well written add-ins are (and even Outlook itself), there will always be the occasional Outlook problem that doesnt seem to go away or may not be related to add-ins at all. You can read how to fix your Outlook problem on the internet, but sometimes the suggestions dont work for your specific case.