Customers using the contact support buttons at the foot of the support pages, or the "email us" links in support Virtual Agent, are unable to open the Help Pane. Some users may not be able to empty their Deleted Items folder. Some users may not be able to see the left folder pane. While we fix the problem, you can send the file as a OneDrive link.



This issue has been fixed for Outlook.com country domains. If you used the workaround below you can now switch from using an Outlook.com alias to your country's domain. The root cause has been isolated to a bug introduced in build 8962, which was partially reverted, and further mitigation efforts are ongoing.

Repair Office

Many users report common Outlook problems on Microsoft forums and support platforms. In this guide, we’ll walk you through practical, do-it-yourself solutions to troubleshoot and fix these issues so you can get back to work without delays. This issue has been mitigated and we are continuing to monitor the issue to ensure stability. The root cause was the deployment of an incorrect campaign data file, which led to false positive campaign detection. We have since reverted to the right data file and the outbound email flow has returned to a normal state. We also released a new rule that corrected the wrong campaign verdict for all impacted customers during the incident.

Common Reasons Outlook Crashes In Office 365

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. If you typically use Troubleshooting Outlook sync problems 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. This fix will also lead to a reduction in the total number of contacts on your contact list.

• We will update this article as soon as we have more information on a fix.
• Configure your antivirus software to exclude Outlook files or processes from real-time scans to avoid interference.
• As active members in the IT community, we work to support our clients’ businesses and provide them with peace of mind.
• Check the status bar at the bottom of the screen to see if another process is running.
• The root cause has been isolated to a bug introduced in build 8962, which was partially reverted, and further mitigation efforts are ongoing.

Does classic Outlook stop running or refuse to start?

Visit Firefox support to learn how to Disable or remove Add-ons. Check that you have not accidentally blocked the Gmail domain when blocking one Gmail user. We will update this article as soon as we have more information on a fix.

After sending an email, users get a non-delivery report with an error

There’s nothing in particular to warn you about, as there are many informational and diagnostic information there, but reading the entries may lead to a clue about what’s going wrong. Note that you can sort by clicking on the Source column. If you have Outlook in your startup folder, remove the shortcut from the startup folder. TrustedTech is a Microsoft solutions Partner in the following areas. Save the repaired file to PST, MSG, EML, PDF, HTML or export directly to Office 365. Outdated or conflicting ones can mess with Outlook’s core performance, causing unexpected slowdowns or outright failure to launch.

To access the calendar shared with your Microsoft 365 for business account, you'll need to accept the invitation from Outlook on the web, iOS, or Android. 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.



As active members in the IT community, we work to support our clients’ businesses and provide them with peace of mind. TrustedTech is dedicated to being a reliable resource for all software and technology support needs. Our relationship to the Microsoft Partner Network allows us to provide competitive pricing and authentic software and support, all with a much-needed human element.

Uninstall and reinstall the new Outlook for Windows

While built-in tools like ScanPST offer a basic Safety net, they often fall short when it comes to rectifying deeper file damage. In addition, you can export directly into Office 365 mailboxes after recovery with no middle step required. 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. It warns that once you pass certain limits such as the number of folders or messages, performance can nosedive.