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Opened Sep 20, 2025 by Danilo Persse@danilopersse1
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Outlook performance issues in a Cached Exchange Mode ost or .pst file Outlook Microsoft Learn

With great functionality, you can manage your email, contacts, calendar as you like. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. These troubleshooting techniques apply to Outlook 2016 and 2011 for Mac. Outlook Fix Blog Sometimes, when you’re using Outlook, it might ask for your confirmation before doing something. For example, if you try dismissing all reminders, Outlook might show a message asking, ‘Are you sure you want to do that?

There is currently no option to revert to the prior behavior, but we would love to hear your feedback to help us with future designs. To learn more about how to send us feedback, please see How do I give feedback on Microsoft Office. Note that you can quickly tell how your mail is currently sorted, by the presence of a small triangle on the field headers. You may notice that All, Unread , Mentioned and other sort and filtering options, such as By date, and Newest are missing in Outlook above your email list. Please install the Windows 10 Fall Creators Update to fix this issue. Outlook 2016 freezes when you try to preview an Excel file that's attached to an email.

You can also add the secondary connected accounts (Gmail, Yahoo, etc.) in Outlook.com as additional accounts in the Outlook profile. Not something you want to take on lightly, but sometimes you have to. 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.

Depending on the answers, you could possibly skip large portions of this guide or even directly get a solution to your startup issue. Either disable caching or reduce the cache from unlimited, 12 months or whatever it is, to 3-6 months, all other data, the user would have to click ‘access on server’ or some other similar verbiage. You might need to set Windows Update to automatically download and install recommended updates. Installing any important, recommended, and optional updates can often correct problems by replacing out-of-date files and fixing vulnerabilities.

Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. In this window you can check the status, the number of failed requests (under Req/Fail), and which mailbox is experiencing the issue. Outlook email accounts are provided to employees, students, alumni, retirees, and for generic accounts.

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. This issue affects all Outlook versions on Windows 7, Windows 8, Windows 10. A vast community of Microsoft Office365 users that are working together to support the product and others. The settings in the Send/Receive Group windows let you customize the synchronization rate of the new group. To the right of each folder is the Empty drop-down menu which provides options to delete all items in that folder, or items 3 months and older, 6 months and older, and 12 months and older.

We can fix the problem for you, or you can use the troubleshooting steps we're providing below to help resolve these startup issues. A corrupted profile, a damaged PST file, faulty add-ins, or improper Outlook startup settings often cause this issue. Should you decide to remove a profile, back up the data files first. All offline cached content will be deleted when you choose Remove. For more information, see Introduction to Outlook Data Files (.pst and .ost). If Outlook worked correctly the last time and nothing has changed about your account configuration, then checking if things work correctly in Safe Mode is a good first step.

However, if you want to change your password with your email provider, you'll need to visit their website or help desk, or contact your email administrator. For example, if you have a Yahoo! account, you first have to change your password at Yahoo.com. Once you've changed your password with your email provider, you can update the password in Outlook. See Change or update your email password for more information. Most Outlook problems can be fixed with proper troubleshooting.

If it never worked before or if you are starting Outlook for the very first time, it could very well be that you have not configured your mail account correctly. A common mistake is choosing for an Exchange account while in fact you are using a POP3 or IMAP account. Just to make sure you are not Outlook Fix Blog trying to troubleshoot an issue which has already been solved, before you begin verify that you have installed all updates for your version of Outlook. I’m not certain to which post you’re referring, but everything that’s been mentioned so far can be done directly by the user. No elevated permissions are required to do any of these steps.

Starting Outlook in Safe Mode will prevent some or all add-ins from being loaded, prevents several settings files from being loaded and turns off the Reading Pane. Get Help has troubleshooters for classic Outlook for Windows you can run for many common scenarios, such as Outlook startup or profile setup problems. These often help resolve issues without the need to contact support. When reaching this point of the guide, the issue most likely also occurs for other users on the computer. This means that the issue is not caused by a configuration setting but by an Outlook Fix Blog installation error.

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Reference: danilopersse1/1354375#8