How to Troubleshoot Common Microsoft 365 Problems and Issues

Sometimes, issues can be caused due to a corrupt Outlook OST file.



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 Fix Outlook Not Opening After Windows Update filtering options, such as By date, and Newest are missing in Outlook above your email list.

Troubleshooting Co-Authoring and Collaboration Errors



  • After installing the September Public Update, Outlook 2007 displays mixed languages in the user interface.
  • The person who sent you the invitation will need to remove your permissions and then send a new invitation.
  • Discover how IT leaders can address key Microsoft Copilot questions on cost, deployment, security, and integration to maximize ROI and adoption.
  • Until you can install the Windows Update fix release, you can set a registry key that will cause Outlook to stop using the local Windows Search service.
  • It is a feature-rich application that allows users to manage multiple email accounts, calendars, contacts, and tasks.
  • TrustedTech is dedicated to being a reliable resource for all software and technology support needs.
  • If anyone finds a more permanent solution, I would appreciate it.


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. On January 16, 2025, an update for Microsoft 365 Apps will be released in the Current Channel, as can be seen from the entry MC in the Microsoft 365 Message Center. TrustedTech is a Microsoft solutions Partner in the following areas.

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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

Faulty hard drives or disk errors can corrupt the Outlook data stored locally. This creates crashes that seem random—until you dig into the hardware logs. If you are an Outlook user and encountering connectivity problems with Microsoft 365 mailbox, the steps above may correct the problem. Otherwise, the probably culprit is a damaged OST file. Use the Stellar Converter for OST to extract mail items from the backup (orphaned) OST file. Discover how IT leaders can address key Microsoft Copilot questions on cost, deployment, security, and integration to maximize ROI and adoption.

Outlook Known Issues in November 2021 updates



Users often turn to Microsoft’s ScanPST tool, but it struggles with large files and doesn’t always finish send/receive error 0x800CCC0E fix the job. For issues that are not covered on this page, we have multiple tools to help you automatically diagnose and fix a range of Outlook problems. To edit a shared calendar, go online to your own Outlook.com calendar, open Calendar for Windows 10, or use a mobile device. Read how to Add your Outlook.com account to another mail app.

Outlook Known issues in October 2022 updates



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 Troubleshoot Office 365 Sync and Login 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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