My computer (running Windows 11 Pro) forced an update about two weeks ago. Since the update, my Outlook will not return to "new" Outlook, it deleted my email signature, and is incredibly delayed in getting messages. I am opening the "classic" Outlook app on my computer because the one labeled new seems to not actually be a functioning app (no icon, nothing happens when I click on it). When the Outlook app opens, I can see the 'Try the new Outlook' toggle. The toggle just turns back off and the app does nothing different. I saw a reply to an issue similar to mine that mentioned going to the Registry Editor and followed instructions outlined in that message but nothing change


A new PST file is created instead of repairing an inaccessible or orphaned OST file like ScanOST.exe does. Outlook will synchronize all mail items from the mailbox server with the new OST file. This operates so long as your email profile is active and connected to the mailbox server. The MS Office installation directory contains the file SCANPST.EX


FixTech provides technical support services to help diagnose and resolve common device and software issues. While we strive to offer accurate and effective assistance, results may vary depending on individual circumstances and device conditions. FixTech does not guarantee that all issues will be resolve


Many users have both personal Microsoft accounts (e.g., Outlook.com) and work/school Office 365 accounts. If both are signed in simultaneously, the system can confuse the authentication path. Log out of all accounts and sign in with only one — preferably the one with your Office 365 subscription. Tell us the issue, no long waits, no tech jargon. If all else fails, or the issue persists despite taking the recommended course of action, open a support reques


The error could be caused by malicious activity, misconfigured MFA settings, or other factors. To investigate further, ask an IT solve Office 365 mailbox sync delays administrator to look at the Microsoft Entra sign-in logs. We’ve got a support case opened with Microsoft on this one but it’s been open for about 3 months. Unfortunately when the problem occurs they’ve asked us to ring straight away but of course you can never get them instantly (we’ve just been given someone’s direct number now


In the meantime, please use the workarounds suggested for each issue. 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 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 alia

You can create a new Outlook Data File and drag the items in the Lost and Found folder into the new data file. After you've moved all the items, you can remove the Recovered Personal Folders (.pst) file, including the Lost and Found folder. You can use the Inbox Repair tool (SCANPST.EXE) to diagnose and repair errors in your Outlook data file. The Inbox Repair tool checks the Outlook data files on your computer to see if they're in good shape. After locating the ScanPST, launch the tool and follow these steps to repair the PST file.


The problem usually occurs due to authentication token mismatches, cached credentials, or browser session conflicts. In this guide, we’ll walk you through every step to fix Office 365 login problems on both Windows and the web version. If none of the above steps work, you may need to use a more advanced troubleshooting tool to diagnose and fix the login issue. A developer console is a feature of most browsers that can be used to inspect and modify the code and elements of a website. To access it, open your browser and go to the website you are trying to solve Office 365 mailbox sync delays log in to, then right-click on the login page and select inspect or inspect elemen


Following the above steps—from safe mode diagnostics to repairing data files—will restore functionality in most cases. FixTechGuide’s free email diagnostic tools automate error detection by scanning your configuration files, registry entries, and mail protocols. The platform validates SMTP, IMAP, and POP3 settings against verified databases to identify version mismatches or broken profiles introduced after system updates. You can also add the secondary connected accounts (Gmail, Yahoo, etc.) in Outlook.com as additional accounts in the Outlook profile. This command deletes the custom folder views, restoring default configuration


Another potential cause of login issues is that your browser or system may be outdated or incompatible with the website you are trying to access. To address this issue, updating your browser and system can help fix any bugs, improve your security, and enhance your compatibility. To do so, open your browser and go to the help or about menu to check if there is an update available and install it. Then, open your system settings and go to the update or security menu to check if there are any updates available. Install them if necessary and restart both your browser and system. Login issues can be frustrating and time-consuming for both customers and customer support agent