How To Fix Outlook Crashes In Office 365: A Guide For IT Admins

Concepcion Scerri
2025-10-28T09:25:31Z

Start Outlook in safe mode to fix "Processing" screenIn Windows 10, choose Start, type Outlook.exe /safe, and press Enter.In Windows 7, choose Start, and in the Search programs and files box, type Outlook /safe, and then press Enter.In Windows 8, on the Apps menu, choose Run, type Outlook /safe, and then choose OK.

Even if an email address is spelled correctly, a message cannot be delivered if such a mailbox doesn’t exist. Usually, a message of non-delivery will be generated, which will include important details about the delivery problem. When people complete a subscription form, they may enter their email address incorrectly.

Here are some solutions for when the search is not functioning on a Mac. There are different steps to take if you are on Windows (you'll need to locate the Search Index) or Mac (use Spotlight). First, let's read about how to check if Outlook is indexing on Windows.

Now, let us move into the solutions to fix the issue of MS Outlook. Position your company at the center of the tech conversation with spotlight articles, executive interviews, and monthly roundup opportunities. Connect with key decision‑makers, build trust, and expand your brand’s authority across the B2B tech space. Save the repaired file to PST, MSG, EML, PDF, HTML or export directly to Office 365. This should get you back to business promptly. Select the corrupted PST or OST using the file picker.

Sometimes you send an email and discover later that it is not delivered to the intended recipient. By following this checklist, you can systematically troubleshoot and resolve most common email sending issues. 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. Customers with only a 3rd party email address set up as the username of their Microsoft Account will be asked to add a 1st party Microsoft alias to their account before accessing Outlook.com.

We have since reverted to the right data file and the outbound email flow has returned to a normal state. We also released a new rule that corrected the wrong campaign verdict for all impacted customers during the incident. It's a by-product of making more space on your PC, you visit Fix Outlook Site delete things you don't think you need anymore. Then, one day you realize getting rid of that file was a huge mistake. Let's eliminate any feelings of despair regarding a deleted file.

Then, each item in your calendar folder is checked for known problems that can cause unexpected behavior, such as meetings that seem to be missing. After you've selected a task, you can use the details pane to do things like add more information, add steps, or mark as important. You can view more than one calendar at a time, add other calendars, choose which calendar to display, and create new calendars. You can use the Inbox Repair tool (SCANPST.EXE) to diagnose and repair errors in your Outlook data file. The Inbox Repair tool checks the Outlook data files on your computer to see if they're in good shape. Use the People page to find, view, create, and edit contacts and contact lists.

However, before that, you must figure out the real cause of the issue. Later, go for the best solution that suits the cause of the Outlook issue. Additionally, if the issue causes PST file corruption, use the suggested software for better results. However, we came across many users who are still struggling with this Outlook issue. They still wonder ‘Why is Outlook constantly not responding? ’ So, it is possible that your PST file will get corrupted and you can lose all important data.

These pop-up messages can sometimes make Outlook Not Opening in Windows 10 error. As a result, if Outlook seems stuck or not responding, check any open pop-up messages on your screen. To check for these messages, press Alt+Tab on your keyboard. It will help you switch between windows and see if any pop-ups need attention. Here's the deal, when Outlook manages to open, all the files you delete will automatically be recreated. It gets better because you also resolve all the Outlook opening issues.

The default SMTP port (25) may be blocked by some Internet Service Providers (ISPs) due to spam concerns. Currently, you can't use Outlook on Windows to edit calendars that are shared with your Outlook.com [visit Fix Outlook Site](https://sites.google.com/view/fixoutlookstuckonloadingprofil/home) account, even if you've reconnected your Outlook.com account to Outlook. We're working to make it possible to edit shared calendars in Outlook 2016 for Windows. If you are having issues sending email, this might be due to validation issues with your Microsoft Account.

If you can't choose any of the menu options, type inside an email message, calendar event, or contact, Outlook may have frozen. There are three steps you can take to try to get Outlook working again. However, if you encountered other issues like Outlook not responding, learn how to fix Outlook not responding here. Click the above link to have a quick download, then you can have Outlook errors fixed within minutes. Check the solutions to fix "Outlook not opening" problem and how to avoid "Outlook won't open" again. Here are some common fixes that should work when Outlook doesn't open, whether you're using Windows or a Mac.