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

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However, sometimes, it can experience connectivity issues, especially when using a Microsoft 365 account.



Fix Outlook and Office 365 Errors 2025

Save the repaired file to PST, MSG, EML, PDF, HTML or export directly to Office 365. Select the corrupted PST or OST using the file picker. Note that you can quickly tell how your mail is currently sorted, by the presence of a small triangle on the field headers. Another options is to use the Filter Email button on the ribbon. You may notice that All, Unread , Mentioned and other sort and Exchange connectivity diagnostic filtering options, such as By date, and Newest are missing in Outlook above your email list.

Troubleshooting Co-Authoring and Collaboration Errors



  • 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.
  • This post also mentions the downgrade to an earlier Microsoft 365 build, which was previously described as a workaround.
  • Sometimes, issues can be caused due to a corrupt Outlook OST file.
  • Outlook slows down, crashes randomly, or fails to load entirely.
  • It seems like something went wrong on Microsoft update and they might recall it or fix it, so we might need to wait untill that.
  • The loading of unregistered MAPI services has been disabled by default to make Outlook more secure.
  • As active members in the IT community, we work to support our clients’ businesses and provide them with peace of mind.
  • When this registry key is set, Outlook will use its own built-in search engine.
  • 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.


TrustedTech is a Microsoft CSP Direct Bill Partner with all six Solutions Partner designations and decades of expertise in licensing, support, and cloud infrastructure. If you're looking for smarter ways to manage, secure, or optimize your Microsoft 365 (M365) environment, our U.S.-based team is here to help. In addition, you can export directly into Office 365 mailboxes after recovery with no middle step required.

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Fix Outlook and Office 365 Errors 2025

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. If you're using Outlook 2010, Outlook 2013 or Outlook 2016, uninstall and re-install iCloud to resolve this issue.

Fix Outlook and Office 365 Errors 2025

Outlook Known issues in April 2023 updates



Fix Outlook and Office 365 Errors 2025

After installing the September Public Update, Outlook 2007 displays mixed languages in the user interface.

Outlook Known Issues in November 2021 updates



As it mostly happens due to damaged Outlook files in this situation, you need to opt credential loop in Microsoft 365 for the BitRecover PST Repair Tool as this software can easily handle individual or batch Outlook files. This software is also reliable to restore and convert damaged, corrupted, and oversize Outlook files. Your antivirus software can also cause issues with Outlook connectivity. Some antivirus software may block Outlook from connecting to the internet.



Now we know the causes of Implemented error in Outlook, so, let’s forward to know the solutions to fix it. Try these manual methods to restore Outlook functionality. A vast community of Microsoft Office365 users that fix Outlook after Windows update issues are working together to support the product and others. The update for Microsoft 365 Apps will be rolled out gradually to users of this update channel from January 16, 2025 (PST). Microsoft Outlook crashes with the above build on Windows Terminal Server under Windows Server 2016 with the following error message. TrustedTech is dedicated to being a reliable resource for all software and technology support needs.
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