If your Outlook OST file isn’t syncing properly with Office 365, you’re not alone. Thousands of users face corrupted OST files, sync errors, and missing mailbox data after system updates or unexpected shutdowns. In this 2025 guide, we’ll show you how to repair the Outlook OST file and restore seamless email performance without losing important data. If your Outlook inbox isn’t refreshing automatically, leaving you waiting for new messages, you’re not alone. Many Microsoft 365 and Outlook users experience email synchronization problems caused by outdated cache, network delays, or improper settings. Here’s a complete 2025 guide to get your mailbox updating in real time again.


Created when the account is configured with POP protocol. Created when the account is configured with IMAP protocol, Office 365, Outlook.com, & Exchange. A. Yes, you can convert OST to PST format, and several Microsoft professionals suggest using Shoviv’s automated tool for this. Step 1 Firstly, you'll have to open the respective tool depending on your Microsoft Outlook version. You can check the location of your Outlook Data Files in Outloo

Incorrect send/receive intervals often delay inbox updates. Go to File → Options → Advanced → Send/Receive and set automatic send/receive every 5 minutes for best performance. Large mailbox sizes, unstable network connections, and abrupt shutdowns are the leading causes of OST corruption. Microsoft provides a built-in tool called SCANPST.EXE to scan and repair minor OST corruption. Chat with our experts or create a support request now.


Had my agenda only in the ost, so not synched to the webmail.After making a new profile my agenda items were gone. Used the Recovery tool for Outlook to restore the items to a PST from a backup of the old OST files. This worked read this blog post from fixtechguide.com well although only the agenda item are restored, not the attachments and extra information field. The Microsoft Outlook Inbox repair tool includes an online version, found here. The Outlook Online Repair Service allows you to repair corrupted PST/OST files on any device (desktop, tablet, phone) with any OS (Windows, Android, macOS, iOS and so on


Only this one user has experienced this problem since the first week of our migration, but there were 3 initially. I can try re-imaging his machine, but it was recently read this blog post from fixtechguide.com imaged, so I’m not sure if that will help. Below is what the connection status displays while the problem is occurring, alternating between "Established" and "Connecting". These troubleshooting tips can help you resolve common issues that prevent the new Outlook inbox from updating properly. If you continue to experience problems, consider reverting to the classic Outlook application or contacting Microsoft Support for further assistance. Is she able to properly access the shared mailbox through OW


In case it helps, my MacOS Canary installation is logged read this blog post from fixtechguide.com in with the account I want to use moving forward (that's where I'm writing this post from), but my MacOS Dev installation is stuck in this weird state. I've run into a problem with logging into the MS Tech Community Forum. By chatting and providing personal info, you understand and agree to our Terms of Service and Privacy Policy. We have been experiencing the exact same issue for months now. I experience the issue myself as well, every once in a while. On the off chance that none of these things solve this issue for you, please contact our support team


We are looking at using conditional access policies where a user with a Domain joined PC is not prompted for MFA. Right now we have it set to prompt when a user is not on any of our corporate networks or they are using a mobile device. To locate and view the registry setting for Anonymous Authentication in the Outlook profile, follow these steps. Problem doesn’t just happen on PC’s connected read this blog post from fixtechguide.com to the internal network, but can happen when a laptop is remote and connected via external wifi or mobile hotspo


Yeap, you describe it exactly and unfortunately we still don’t have an answer. Closed the window without entering anything and Outlook returned to ‘Connected to Exchange’. When I click on Sign In, the browser launches a login screen/process that really wants to log me in using cached credential


If that doesn’t work, read this blog post from fixtechguide.com you can download the repair tool by following the instructions in the link below. While using Microsoft Outlook, you may face several issues. One such issue that many users face is synchronizing error


One of SecureRecovery®’s key strengths is its non-intrusive approach to file recovery. Our software only analyzes the damaged file without altering any of its original data, ensuring the remaining integrity of your files is intact. Additionally, SecureRecovery® is compatible with most versions of Microsoft Outlook, and supports both .pst and .ost file formats. Our cutting-edge software performs a thorough scan and analysis of your corrupted Outlook files and read this blog post from fixtechguide.com this blog post from fixtechguide.com then goes on to export all recoverable data into a fresh .pst file. However, in cases of severe file corruption, some data loss may be inevitable—but rest assured, our tool will recover more than any competing recovery utility. I exported from Oulook 365 a folder with a lot of e-mails, ans had a .pst 2,28 Go fil