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Opened Sep 18, 2025 by Bryce Campion@bryce29d51702
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Outlook: How to repair corrupted PST and OST files

If the recovery options displayed for your account are out-of-date, go to the "Can't sign in after trying the steps above?" section of this help article for more info. Stellar Exchange Server Backup is an excellent software to take backup of full Exchange Outlook performance fixes database or selected mailboxes. It minimizes Exchange downtime by restoring all mailboxes directly, without interrupting Exchange server services. You have important things to do in your Yahoo account, so let's get you back in! After you regain access to your account, consider switching to 2-Step Verification to avoid sign-in issues entirely.

If you're trying to set up an iCloud account, follow the steps in Add or manage an iCloud email account in Outlook. For Gmail accounts, see Add a Gmail account to Outlook. 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.

If you’re still having problems, you can try resetting your Windows Firewall settings back to default. Once the add-ins are disabled, close Outlook 2016 and restart the application normally to check whether it now opens as normal or not. You can determine if it's corrupted by creating a new profile and changing which profile is used when Outlook starts.

All the PST file details will be loaded into the Repairit tool. A person like you uses multiple tools while being in the professional field. From complex tools to essential tools such as Microsoft Outlook, we see millions of users operating across the globe. Talking about Microsoft Outlook, it is one of the most used tools and recommended by all professionals who are to deal with hefty mail.

In this case, you can reset your view settings before opening the Outlook performance fixes app. Select your Microsoft Office installation on the list and choose "Change" at the top. In this case, open Outlook in safe mode where your add-ins aren’t loaded and remove any suspicious add-ins. In most cases, Outlook doesn’t tell you why it isn’t opening, which leaves you guessing as to what has caused the issue. Due to underlying system or PST issues, Outlook may crash, freeze, or not function properly. Find solutions to common problems or get help from a support agent.

Start Outlook in safe mode to fix "Processing" screenIn Windows 10, choose Start, type Outlook.exe /safe, and press Enter.In Windows 7, choose Start, and in the Search programs and files box, type Outlook /safe, and then press Enter.In Windows 8, on the Apps menu, choose Run, type Outlook /safe, and then choose OK.

Start classic Outlook in safe modeIn Windows 10, click Start.Type Outlook /safe, in the Search programs and files and then click OK.Close and re-open Outlook.If the issue is resolved, you can keep working, or if you have time, take the following steps to find out what COM Add-in is causing the problem.

Before proceeding to the steps below, consider backing up your Outlook data file. The Inbox Repair tool should also create backups before you begin the repair process. Whether you backed up the data file manually or with the Inbox Repair tool, we recommend remembering the backup location. In the Folder Pane, you might see a folder named Recovered Personal Folders that contains your default Outlook folders or a Lost and Found folder. Although the repair process might recreate some of the folders, they may be empty.

If your account is affected, be sure to secure your account and update your recovery information. "I had a large PST file that was causing Outlook to crash. Cigati handled it like a breeze. The software is user-friendly and provides clear instructions. I'm so glad I found this tool." If your Microsoft account recovery request wasn't granted, you can keep trying as many times as you want, up to two times per day.

Similar to our earlier suggestion of repairing Office (see #3 Repair Your Microsoft Office above), perform the same steps except choose to Uninstall. Be aware that you may need your product key if you received one. If you need to update your email's POP or IMAP account settings, please go to POP and IMAP account settings for more information.

If Outlook is NOT able to start in safe mode, then try the next proposed solution below, entitled Create a new Outlook profile. Despite the various avenues mentioned, the problem is identified only on RDS 2016 Outlook performance fixes (5 servers) with Office 2016. Curiously, there are no issues with PCs running Windows 10 or 11 and Outlook 2016, all within the AD. I initially had a script to remove the entire Outlook folder if date created was before the date of implementation. I’ve modified this to remove the above autodiscover records on user login as a temp workaround.

On deciding which content you want to save, set the desired Outlook performance fixes path on your device. While handling it, you might have accidentally changed some unwanted settings. There is another situation where your application's cache may be full. For both conditions, you have to access your Outlook settings and make appropriate changes to repair Outlook Mac. The issue can be related to the application if your Mac is updated. You will record such problems if you have not updated it regularly and have a pending update.

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Reference: bryce29d51702/3538547#3