This reliable Outlook PST repair tool can repair large PST files efficiently and https://office365emailfix.blogspot.com/2025/10/fix-outlook-not-sending-or-receiving.html quickly, regardless of the severity of corruption. It allows to save the mailbox data from the repaired PST to a new PST file and various other file formats, including MSG, EML, RTF, HTML, and PDF. The error message states that there are some issues with Outlook PST files. This error tends to pop-out when you attempt to launch Outlook. Outlook simply denies the existence of PST file because the file is corrupt and cannot be accessed anymore. Another reason can be Outlook is set to read-only mode, which stops Outlook from accessing the PST file.

If it does, the problem is definitely in your antivirus software. In this case, you can either contact its vendor for assistance or simply choose another protection program. For large pst’s, first, split them https://office365emailfix.blogspot.com/2025/10/fix-outlook-not-sending-or-receiving.html into smaller files, the run a scanpst on each one. Every time, one of the pst’s they had connected, had multiple issues that scanpst took care of and then no more issues. When you install Office, an Inbox Repair Tool (SCANSPST.EXE) is also installed on your PC. The Inbox Repair Tool can resolve issues by scanning your Outlook data files and repairing errors.

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.

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 https://office365emailfix.blogspot.com/2025/10/fix-outlook-not-sending-or-receiving.html 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.

Is there a reason that you’re downloading email to a PST file instead of syncing with the online service? With Office 365 we generally only keep a years worth of email on the local system and find that local performance is decent. This article explains how to resolve problems with Microsoft Outlook hanging, freezing or crashing. Our 9 working solutions will help you fix the "Outlook Not Responding" issue and bring your Outlook back to life. The solutions work for Outlook 365, 2021, 2019, 2016, 2013, and earlier versions.

In this regard, we recommend Kernel for Outlook PST repair tool to save your precious time. When you reinstall Outlook, you are removing the current application from your system and then installing it again. Reinstalling your Outlook client can fix installation errors and common software failures. In case of Outlook crash, re-installing the application is the most recommended method to fix the issue. Get Help has troubleshooters for classic Outlook for Windows you can run for many common scenarios, such as Outlook startup or profile setup problems.

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 https://office365emailfix.blogspot.com/2025/10/fix-outlook-not-sending-or-receiving.html to Outlook. We're working to make it possible to edit shared calendars in Outlook 2016 for Windows. If you uninstalled via add/remove programs, you may want to go more aggressive on it. TrustedTech is a Microsoft solutions Partner in the following areas. TrustedTech is dedicated to being a reliable resource for all software and technology support needs.

To resolve this issue, switch Outlook not opening on Windows 10 (https://office365emailfix.blogspot.com/2025/10/fix-outlook-not-sending-or-receiving.html) from read-only mode and try moving your PST file from external drive to hard drive. You can check that the Outlook configuration settings are correct and your internet connection is stable. You may also temporary disable your firewall or antivirus program to check if it’s responsible for the error. If the PST file is corrupted, you can try repairing the file using the Inbox Repair Tool (SCANPST.exe).

To reduce the number of items that are stored locally, limit the synchronization window that's used for shared folders. These keys don't clean up older Calendar content that was already downloaded. However, this method can be effective if you're willing to clear offline items and resync your Calendar (instead of bulk deleting old items). If you already have the Calendar in the profile, you have to clear the Offline Items after you set the registry keys and restart Outlook. In Sync Window Settings, adjust the number of months of data that are synced for the primary shared calendars. Use the Turn on shared calendar improvements option for users who have edit permissions to a shared calendar to improve performance.