How to Fix OST File Won’t Open in Outlook 2016 ?

As everyone knows, Microsoft regularly introduces Outlook updates to fix bugs, improve and add features. However, the updated version must be installed correctly. Else these may result in errors. For example, “OST File won’t open in Outlook 2016”.

The following section describes cases of this error encountered by Office users.

The user upgraded Office 365 to Office 2013 to version 2016. Immediately after the upgrade, users were unable to synchronize Outlook with the Exchange ActiveSync server and, therefore, Outlook could not perform these functions i.e., sending and receiving mail, Calendar or updates.

The user deleted the existing Outlook profile and created a new profile to fix the issue. For this action, it was necessary to create a connection between the server and mail client, but the problem was aggravated by following error message in Outlook:

Thus, user is uninstalled and reinstalled the complete instance of Office 365. However, the .ost file is not open even after reinstalling the application.

Previous incidents provided an overview of OST file issues that could affect a large number of users after upgrading to Microsoft Office 2016 from Office 365.

 

First, be sure to create a duplicate account. In that case, set one of the default accounts to fix the “OST File won’t open in Outlook 2016” problem.

Otherwise, that is, if there are no duplicate accounts, use the following methods to resolve the trouble:

Technique 1: Create a New Outlook Account

Resolve the issue by creating a new Outlook profile for Microsoft Outlook 2016 and using automatic account configuration to synchronize the account with Exchange ActiveSync server. Follow these steps to create a new profile.

1. Set up Outlook and select [File]> [Account Settings]> [Profile Management].
2. Select View Profile > Add.
3. The Profile name field is set. Add a name the profile and click on OK.
4. Select [Auto Account Setting], and select [Manual Setting] if not selected.

What Users Actually Reported on this Method?

The user followed all the instructions to set up an automatic account, confirmed the connection to Outlook and testconnectivity.microsoft.com credentials. However, the same error message was displayed when the user tried to open Outlook profile with new OST.

Other users report the same issue after setting up a new computer with Windows 10 and Office 2016 terms.

Technique 2: OST to PST Conversion to Fix “OST File won’t open in Outlook”

This method is based on using software utility to extract data from inaccessible OST file mailbox to PST and easily import it into Outlook. The following steps to convert OST to PST are based on using Gael Converter for OST / PST conversion in Outlook.

1. Start the software.
2. Find and select the .ost file
3. Select Convert option to analyse process.

4. If the conversion is successful, the program checks the converted file.
5. Check the data, select mailbox item, and click Save. Enter the path to save PST file
6. Import and open Outlook profile PST file without any restrictions.

OST to PST Converter software delivers the best solution for restoring access to mailbox data stored in .ost files that won’t open in Outlook 2016. Easy to perform less actions / resources, faster results, saving time, and more trustworthy.

Conclusion

Microsoft Outlook is one of the most widely used e-mail clients today to meet the changing needs of users and provide a multi-functional environment. This article describes a manual and professional approach to Outlook issues. “.Ost file won’t open in Outlook 2016.” This error occurs when the user cannot open the .ost file after updating Microsoft Outlook. This means that the manual approach is lengthy, time-consuming and unwieldy.

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