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Add Troubleshoot Outlook for Windows issues

Juliana Swinford 2026-01-12 07:32:35 -05:00
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Content<br>
After updating Office, you may experience a brief flashing window every hour, which triggers the OfficeBackgroundHandlerRegistration task to start running. For more information about when builds are available for their respective channels, go to Update history for Microsoft 365. We're investigating the issue and will update this page when a fix is available. MAPI does not validate that a provider's DLL that it is requested to load is registered correctly in MapiSVC.inf or even that it comes from the local machine. This can be exploited by creating a file together with an OLE object in such a way to cause MAPI to load a DLL from a network share when the OLE object is activated.
My Outlook 365 won't open after a Windows update yesterday.
Occasionally, classic Outlook tries to run a process in the background. 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. 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.
Outlook Known issues in June 2022 updates
The only other change to the Exchange Server was a certificate update for IIS. This is a standard DigiCert wildcard cert that we have replaced every year with no issues. If you can't open Outlook, or Outlook disappears or crashes, one of your add-ins may be to blame or you may need to update Outlook. Right-click the folder, and then click Properties to check your permissions for the folder. See the folder owner or your administrator to change your permissions.
Outlook Known Issues in June 2021 updates
The loading of unregistered MAPI services has been disabled by default to make Outlook more secure. Currently, you can't use Outlook on Windows to edit calendars that are shared with your Outlook.com 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. We've run into some issues with the 'New' Outlook this week after 6+ months of usage that other may run into.
Some Web-based Outlook add-ins don't work in when using on premise Exchange 2013
Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.You might need to set Windows Update to automatically download and install recommended updates.FixTechGuide’s free email diagnostic tools automate error detection by scanning your configuration files, registry entries, and mail protocols.To access the calendar shared with your Microsoft 365 for business account, you'll need to accept the invitation from Outlook on the web, iOS, or Android.Most startup failures arise from minor configuration mismatches or outdated components.We've run into some issues with the 'New' Outlook this week after 6+ months of usage that other may run into.By the end, you’ll know exactly how to restore your Outlook and prevent future errors.
My computer (running Windows 11 Pro) forced an update about two weeks ago. Since the update, my Outlook will not return to "new" Outlook, it deleted my email signature, and is incredibly delayed in getting messages. I am opening the "classic" Outlook app on my computer because the one labeled new seems to not actually be a functioning app (no icon, nothing happens when I click on it). When the Outlook app opens, I can see the 'Try [recreate Outlook profile step by step](https://gitlab.mpeeo.com:443/lionelsae76244/8257358/-/issues/4) the new Outlook' toggle. The toggle just turns back off and the app does nothing different.
Outlook known issues in the June 2017 security updates
This occurs because custom form script is now disabled by default. For persistent issues, use FixTechGuide’s automated tools to perform deep diagnostics and security checks. Stay updated, back up regularly, and enjoy uninterrupted productivity in your Outlook workspace. Online Repair reinstalls Outlook [Troubleshoot Office 365 Sync and Login Issues](https://gitlab.mpeeo.com:443/harlanseveranc/resolve-outlook-not-sending-emails-fast8879/-/issues/4) components while preserving your data, resolving DLL and registry mismatches that prevent startup. This process checks for structural issues and automatically fixes them.
Getting Started Is Easy
Many users encounter startup freezes, profile loading loops, and crashes following major Windows patches or Office updates. Fortunately, most of these errors stem from configuration conflicts, corrupted data files, or outdated components that can be fixed with a few targeted steps. If your Outlook suddenly stopped opening after a Windows update, don’t panic.
Repair Outlook OST File Not Working in Office 365 – Complete Fix (
If you're using Outlook 2010, Outlook 2013 or Outlook 2016, uninstall and [guide to Office 365 sign-in errors](https://code.swecha.org/bryce90p917137/online-outlook-email-repair-utility2004/-/issues/1) re-install iCloud to resolve this issue.