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. When this registry key is set, Outlook will use its own built-in search engine. The built-in search will display the message below 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.

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. We're working to make it possible to edit shared calendars in Outlook 2016 for Windows. 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. You can use Outlook performance fixes Microsoft Support and Recovery Assistant to diagnose both Calendar and Mail issues that affect Outlook. To download and install the Assistant, see About Microsoft Support and Recovery Assistant. In some cases, an Outlook messaging profile may be misconfigured.

This happens to accounts that are configured in the iOS Mail app. The loading of unregistered MAPI services has been disabled by default to make Outlook more secure. 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. 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.

When you enable this option, calendar actions are sent directly to the server instead of having to be synchronized from local storage. To fix performance issues that affect your Calendar, try the following methods. Also, determine whether any local network issues might be causing the problem. This includes issues that affect your local proxy server, firewall, or Internet service provider. Outlook uses an .ost file only if the Exchange email account is configured to use Cached Exchange Mode.

In the Search box, type the name or email address of a person or a keyword you want to search for, and press Enter or select . See Working with message folders in Outlook.com to learn more about available folders. Having trouble connecting to your email from Outlook on your desktop? Follow these steps to let Outlook diagnose and fix errors in your Outlook mail profile that might be causing the issue. We love reading your suggestions on new features and feedback about how you use our products!

Use the classic Outlook for Windows connectivity troubleshooter to troubleshoot Outlook connectivity issues. Post questions, follow discussions and share your knowledge in the Outlook.com Community. Switch your alias to an Outlook.com or Hotmail.com account.

Outlook users at times encounter issues and errors when working with the application. By understanding the common Outlook issues, users can swiftly troubleshoot and resolve most of these errors. If there is corruption in the Outlook data file (PST), Outlook performance fixes the solution is to repair the file using the Inbox Repair Tool (ScanPST), which comes pre-installed with Outlook. However, if the tool freezes or fails to repair the PST file, the best solution is to use Stellar Repair for Outlook.

Outlook forwards meeting invitations to other attendees without anyone actually sending an update or forwarding an invite. This happens to accounts that are configured in the iOS Mail app. If you're using Outlook 2010, Outlook 2013 or Outlook 2016, uninstall and re-install iCloud to resolve this issue. To edit a shared calendar, go online to your own Outlook.com calendar, open Calendar for Windows 10, or use a mobile device.

I have been using the New Outlook app for a few months now, no issues. I am able to open the older Outlook app, but Outlook performance fixes cannot access the new app. I have restarted my laptop multiple times and tried to Uninstall the New Outlook but to no avail. So, there are several factors that cause the Outlook web access issue.

The built-in Outlook performance fixes back-off mechanisms in the indexing component of Windows Search or WDS pauses the indexing of Outlook data when the system is under heavy use. The easiest way to let the indexing finish is to leave Outlook running overnight.Additionally, you can reduce performance issues by running Outlook in Cached Exchange Mode. In this mode, Windows Search or WDS searches the local copy of the mailbox instead of the mailbox content on the server. I even reduced mailboxes sizes and that didn't help, I setup a new user (albeit existing PC but new windows profile), and he is having the same issues. If the mailboxes open automatically after removing them and restarting Outlook, they may be auto mapped. This setting can be changed by an Exchange admin by submitting a request via Jira and including the usernames of the client and the usernames of the mailboxes that need to be removed.