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on February 3, 2026
Solutions to Troubleshoot 'Out of Memory or System Resources' ErrorCheck Resource Usage. ...Restart and Update Outlook. ...Optimize System Resources for Outlook. ...Find and Remove Faulty Add-ins from Outlook. ...Increase the Size of the Memory Heap. ...Rebuild the OST File.Apr 7, 2025
Keep track of how to repair Outlook quickly appointments, meetings, or any other event from anywhere. Add, edit, or delete events using daily, weekly, or monthly views. For more information about working with calendars in Outlook.com, go to Using the calendar in Outlook.com.
Use the classic Outlook for Windows connectivity troubleshooter to troubleshoot Outlook connectivity issues. If your mailbox is full, we won't be able to reply to your request. Check that you have not how to repair Outlook quickly accidentally blocked the Gmail domain when blocking one Gmail user. We will update this article as soon as we have more information on a fix.
Select More to see additional actions—for example, an option to print a message. If you want to learn about printing, see Print attachments received in email messages. Having trouble connecting to your email from Outlook on your desktop? Follow these steps to let Outlook diagnose and fix errors in your Outlook mail profile that might be causing the issue. We have recently received some reports of users who are experiencing issues with subscribing to .ics/ical calendars. We're aware of an issue where some users see the error message "Your message can't be displayed right now".
Configure your antivirus software to exclude Outlook files or processes from real-time scans to avoid interference. The AppData folder hosts a lot of files, including bookmarks and cached pages. This might be slowing down or overriding other commands in Outlook.
The Aryson Outlook PST Repair tool offers a demo version that allows you to scan your corrupted file and preview recoverable items (often up to 50 items per folder) before committing to a purchase. It enables you to verify its performance and functionality and ensures your critical data can be recovered without hassle. This command clears any broken settings related to the navigation pane and can frequently fix startup issues. Below, we’ll guide you through a series of solutions, from simple, quick fixes to more in-depth repairs, to help you get Outlook up and running again. Use the Inbox Repair Tool (scanpst.exe) to scan your pst-file for errors. When you use a pst-file, it could be that an issue with that pst-file is preventing Outlook from starting correctly.
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 doesn’t 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 don’t work for your specific case.
Find solutions to common problems or get help from how to repair Outlook quickly a support agent. If Outlook is NOT able to start in safe mode, then try the next proposed solution below, entitled Create a new Outlook profile. Outlook may be running with settings meant for an older Windows version. For more detailed instruction on how to enable or disable add-ins see this Quick Tip.If you you get an error that you cannot disable the add-in see this Quick Tip instead. The "Cannot open the Outlook window" error can be fixed quite easily. If you share this computer with another user, you can ask this other user to logon and ask to verify if Outlook is still working for him or her.
So, we have produced this list of general things to try to resolve your problem in Outlook. To edit a shared calendar, go online to your own Outlook.com calendar, open Calendar for Windows 10, or use a mobile device. If you're still unable to send or receive email, read how to Fix Outlook.com email sync issues. Blocking someone doesn't stop their email from coming to your mailbox, but it does automatically move the message to your Junk Email folder where you can review it (in case it was blocked in error).
Microsoft has released a Windows Hotfix file to remove the contacts folder synced by the Teams app. Some Safari users are unable to add email addresses in the To section, or cannot point the cursor in the To field. Check if your domain is validated according to the new rules of Gmail and Yahoo that will come into effect in 2024. For more detailed information, read our article on SMTP ports.
If your internet connection is not stable, then there could be a chance that Outlook freezes when sending email. If it does and Outlook starts working properly, then most likely the problem is with one of your add-ins, which leads us to the next step. The first thing we need to do is kill all hanging Outlook processes. To do this, start up the Windows Task Manager either by pressing Ctrl + Alt + Del, or by right clicking the taskbar and choosing "Start Task Manager".