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Add Outlook synchronization stuck on "updating inbox" after importing a pst file Microsoft Q&A

Jamila Humphreys 2025-11-29 06:11:31 +00:00
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Content<br>
Once the system is connected to the Internet and the server is available, follow the next solutions to troubleshoot and fix the problem. They were both connected to office 365, when suddenly one day it said "updating inbox" and that's it. You should always use NTLM over Basic authentication, as Basic sends the username and password in the clear, and NTLM is Windows Authentication. On Exchange 2013, you also have a new option called Negotiate, which is recommended.
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Outlook alternates between "Updating this folder" and "Trying to connect". A manual send/receive fails with a "Connection to Microsoft Exchange is unavailable message". I loaded an old mail profile for the same user account and it worked fine, when I switched back to the initial profile it started to work fine as well.
This problem should only occur on the initial synchronization of a folder that is larger than 4 GB.Please make sure you set both the ClientAuthenticationMethod to NTLM and IISAuthenticationMethods to Basic,NTLM (and Basic,NTLM,Negotiate for Exchange 2013).I loaded an old mail profile for the same user account and it worked fine, when I switched back to the initial profile it started to work fine as well.On Exchange 2013, you also have a new option called Negotiate, which is recommended.I reimaged the machine of the lone person that continued to have this problem and Outlook has been working OK for the time being.Once the system is connected to the Internet and the server is available, follow the next solutions to troubleshoot and fix the problem.In this article, you will learn the reasons that can trigger the ‘Outlook 365 stuck at updating mail folders’ issue and the solutions to effectively troubleshoot and resolve the issue.Since some weeks everyday another user calls and tells me he doesn't get mails.
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If the antivirus program isn't Outlook friendly, you may experience certain issues while using Outlook. To check whether the antivirus app is preventing Outlook from updating the Inbox or Outbox folder, temporarily disable the antivirus program and restart Outlook. If the issue is resolved, exclude Outlook processes, Outlook data files, [Fix Outlook Not Opening After Windows Update](https://gitlab.innive.com/augustazgo5404/inbox-repair-tool-alternative9228/-/issues/3) and folder locations from your antivirus program. The SVC record had to be updated in DNS, which was the cause of the autodiscover issue in my last post.
Internet connectivity issues
Client logs and RPC logs on Exchange just show frequent connections and disconnections for the affected user, and I can’t find any other errors. Open RPC connections on Exchange during business hours is about 300 which seems manageable. If some of these Exchange PowerShell commands error out, don’t worry, these are to provide everything from Exchange 2013 back to 2007. In this guide, we’ll take you through simple, [rebuild Outlook data file quickly](https://body-positivity.org/groups/imap-mail-clients-not-syncing-all-emails-with-server/) step-by-step methods to identify the issue and fix Outlook’s sync problem efficiently. Free up your time from routine correspondence with personalized, easy-customizable, dynamic email templates.
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Every affected user has recently been upgraded to Windows 7 64-bit, while I have not had any 32-bit client users report any similar issue. So all signs are pointing to the individual client but I can’t figure out what it is. With automatic send/receive enabled and properly configured, you can maintain regular synchronization between Outlook and the email server, keeping [inbox repair tool alternative](https://gitlab.innive.com/cgmconsuelo509/4603troubleshoot-outlook-synchronizing-folders-error/-/issues/1) your Inbox up to date. I think this problem is resolved, although since it is so intermittent it may be a while before I’m sure. MTU was set to 1514 on the Exchange server rather than the typical 1500.
Per the article below I updated the Ethernet drivers on the the server to the most recent version and the MTU was automatically set to 1500. Not sure why only certain machines were affected but at this point I’m keeping my fingers crossed. Turning off cached Exchange mode works, but the connection seems to be spotty as Outlook will freeze up after a while. Rebooting, deleting the OST and/or mail profile does not have any effect. Things work well for a number of days or weeks but the problem reoccurs eventually.
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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 OWA? In this article, you will learn the reasons that can trigger the ‘Outlook 365 stuck at updating mail folders’ issue and the solutions to effectively troubleshoot and resolve the issue.
Why is my Outlook Inbox not updating?
For example, you may see the following text in the status bar when your Inbox folder is being synchronized with Exchange. This particular user has her own mailbox and then access to another shared mailbox. As of yesterday, the shared mailbox (for her only) is hung up on "Updating this folder" and will never update or receive new mail. Make sure the system has enough storage, especially the volume where the Outlook data file (OST) is stored.