The built-in search will display the message below FixTechGuide mailbox repair steps to indicate it is not using the Windows Search service. The issues documented in this section have been reported after installing the recent updates listed below. We're investigating the issues and will update this page when a fix is available. In the meantime, please use the workarounds suggested for each issue. 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.

Troubleshooting Co-Authoring and Collaboration Errors

• To edit a shared calendar, go online to your own Outlook.com calendar, open Calendar for Windows 10, or use a mobile device.
• Let’s see how to fix Outlook connection problems in Microsoft 365 accounts.
• In these cases, direct escalation to Microsoft or working with a Microsoft CSP partner, such as TrustedTech, can expedite resolution and minimize downtime.
• Understanding the root causes and using the right tools can make all the difference.
• From sync errors to sign-in challenges and collaboration setbacks, these common Office 365 troubleshooting techniques can restore service quickly.
• The app might refuse to launch or crash at the splash screen.
• Outlook crashes are never good, but you do not have to face them unprepared.
• I had picked up on this in the blog post Microsoft Outlook 365 or other MS 365 apps are dropping suddenly errors.

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.

Get Expert Help from TrustedTech

This tool has helped IT teams across healthcare, finance, education amongst many others. Whether it’s restoring email from encrypted backups or recovering badly broken PSTs, Stellar gets the job done with minimal fuss. You don't have permission to create an entry in this folder. 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. 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.

Outlook Known issues in April 2023 updates

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

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 Office 365 Sync Errors 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.



Real-time collaboration is at the core of Microsoft 365; however, issues can arise due to permissions, software version conflicts, or connectivity problems. While M365 is highly stable, it’s not immune to occasional disruptions. Most of these crashes come down to one thing – problematic data files. When they resolve Outlook not sending emails fast get too large, go corrupt, or are poorly configured, things start to break. Please install the latest updates on your phone to resolve the issue. Outlook forwards meeting invitations to other attendees without anyone actually sending an update or forwarding an invite.