How to Fix Unable to Open Outlook when Offline Issue?

Summary: In this blog, we will discuss unable to open Outlook when offline Issue in detail. Solve the error by deleting and recreating the OST file.

You can use Outlook even when you are not connected to the Internet by using “offline mode”. In “offline mode,” you can perform tasks such as reading and composing emails and editing calendars and contacts. This method is especially useful when traveling or when internet connectivity is limited.

To operate “offline” in Outlook, use a file named “OST”. They store a copy of the information on a server on your local computer. This information allows you to use Outlook without an Internet connection. Once the internet connection is established, the OST file will be synchronized with the data in the server mailbox.

Manually Solve Unable to Open Outlook when Offline Error

The offline mode is convenient, but some users complain about using it. In this article, We are focusing on the possible solution to the common error “Cannot open Outlook when Offline”.

If the OST file is corrupt, you may have problems working in offline mode. To resolve the Outlook error, delete the old .ost file and recreate the file. To delete old .ost files, follow the steps below:

  1. Close Microsoft Outlook, Then Open Run Command by Win+R Keys
  2. Next, Type “%LOCALAPPDATA%\Microsoft\Outlook\” then Enter
  3. Select Damaged OST File and Hit Delete Button to Remove the File.

After deleting the old.ost file, you can easily create a new OST file by following the steps below:

  1. Go to the File menu and click Info
  2. Select Account Settings >> Microsoft Exchange >> Settings
  3. Click on More Settings >> select Advanced tab >> Offline Folder File Settings
  4. Select a Destination for Saving OST File and select OK
  5. If you get an error, “.ost file couldn’t be found. Would you like to re-create it’?” Click Yes to continue.

Best Solution to Solve Outlook OST File Corruption Issue

The user cannot resolve the “Unable to Open Outlook when Offline” error by applying the above method. You are then advised to repair OST file and save it to PST using a reliable automated solution which is OST Recovery Software.

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With this utility, you can convert OST data such as emails, calendars, contacts into PST file format. In addition, the software is designed with an easy-to-use interface, making it easy for users to operate the software. This software is compatible with Outlook 2019, 2016, 2013, 2010 and all versions below.

Summing Up

Microsoft Outlook is a reliable and efficient email client. Users may have problems working with Outlook. In this blog, We have covered manual solution get rid of the error “Unable to Open Outlook when Offline”. The user can apply any of the above method to solve the problem. However, it is always recommended to choose a reliable and smart utility to avoid data loss issues.