The built-in search will display the message below FixTechGuide email error solutions 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

• 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.

Check your antivirus software’s settings and ensuring Outlook is listed as a trusted application. The colleagues at Bleeping Computer noticed this update and addressed it in this post. This post also mentions the downgrade to an earlier Microsoft 365 build, which was previously described as a workaround.

Get Expert Help from TrustedTech

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.

Outlook Known issues in April 2023 updates

When built-in tools fall short, professional solutions pick up the slack. Using Cached Exchange Mode in complex environments can lead to painful sync delays. If a user has a large mailbox or lots of folder nesting, syncing might lag or even crash. Let’s look at what causes Outlook to crash, how you can fix it, and a smarter tool that takes a lot of the stress off your plate. Find solutions to common problems or get help from a support agent. The folder may have been deleted or the server where the folder is stored may be unavailable.

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 FixTechGuide email error solutions 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

We're working to make it possible to edit shared calendars in Outlook 2016 for Windows. Not Implemented Error mostly appears in Outlook 2010, 2013, 2016, 2019 and latest Microsoft 365 version. 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. In these cases, direct escalation to Microsoft or working with a Microsoft CSP partner, such as FixTechGuide support for Office 365 TrustedTech, can expedite resolution and minimize downtime. Our licensing engineers can help triage complex problems and ensure you're on the right support path.