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. Sometimes, issues can be caused Outlook sync help from FixTechGuide due to a corrupt Outlook OST file.

Outlook known issues in the December 2018 updates

To repair corrupt OST file, you can use the built-in ScanPST.exe tool provided by Microsoft. Alternatively, you can delete or rename the existing corrupt OST file and rebuild the OST file. We go above and beyond the average software reseller because we built our business on trust. As active members in the IT community, we work to support our clients’ businesses and provide them with peace of mind. TrustedTech delivers unbeatable customer service, with experts in licensing and high-level technicians always on-call to answer your tech issues in-depth. Our Account Managers and Distribution Team fulfills orders quickly and efficiently, giving our customers digital downloads in record time so they can move on to their next big project.

Outlook known issues in the June 2018 updates

Outlook 2016 freezes when you try to preview an Excel file that's attached to an email. 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. If you're using Outlook 2010, Outlook 2013 or Outlook 2016, uninstall and re-install iCloud to resolve this issue. After installing the September Public Update, Outlook 2007 displays mixed languages Resolve Outlook Not sending emails fast in the user interface.

Outlook known issues in the Feb 2018 updates

• 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.
• From sync errors to sign-in challenges and collaboration setbacks, these common Office 365 troubleshooting techniques can restore service quickly.
• 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.
• Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.
• These can include missing files, ghost icons, or documents that do not update in real-time.
• You may notice that All, Unread , Mentioned and other sort and filtering options, such as By date, and Newest are missing in Outlook above your email list.
• Outlook 2016 freezes when you try to preview an Excel file that's attached to an email.
• If you've already clicked the Accept button in Outlook 2016, you won't be able to re-accept the invitation from another Outlook application.

The person who sent you the invitation will need to remove your permissions and then send a new invitation. 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. Your antivirus software can also cause issues with Outlook connectivity. Some antivirus software may block Outlook from connecting to the internet. Check your antivirus software’s settings and ensuring Outlook is listed as a trusted application. 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.

Fixes or workarounds for recent issues in new Outlook for Windows

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 issue affects all Outlook versions on Windows 7, Windows 8, Windows 10. Boost your SMB’s security and compliance with Microsoft 365 Business Premium. Discover Defender and Purview add-ons for enterprise-grade protection at SMB-friendly pricing. TrustedTech is a Microsoft CSP Direct Bill Partner with all six Solutions Partner designations and decades of expertise in licensing, support, and cloud infrastructure.

Want more options?

We love reading your suggestions on new features and feedback about how you use our products! To learn more about how to share feedback, see How do I give feedback on Microsoft Office. 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. Please install the Windows 10 Fall Creators Update to fix this issue.

Outlook known issues in the September 2019 updates

Microsoft Outlook is one of the best-known business-class email clients from Microsoft. It is a feature-rich application that allows users to manage multiple email accounts, calendars, contacts, and tasks. Outlook also offers several advanced features, like email tracking, read receipts, and email templates, making it a powerful tool for managing email-based workflows. However, sometimes, it can experience connectivity issues, especially when using a Microsoft 365 Office 365 sync problems and login fixes account.

VBscript does not run or you receive malicious code warning when using a custom form for Outlook

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. Microsoft offers several built-in tools to help identify and resolve persistent issues. 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. 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. Find solutions to common problems or get help from a support agent.