Resolve Error OST is already In Use by the Maximum Number of Applications

Every large or small organizations uses one or other email application to communicate or share information with other employee. But maximum office users make use of MS Outlook as their email client and MS Exchange as the server. The reason for such huge popularity of Outlook could vary from one individual to another, but the fact remains that MS Outlook is the most accessed email client all around the world. Important point to note is such huge popularity doesn’t mean that you won’t face any trouble while working on MS Outlook. Consequently, the best thing that you could do is deal with such unfortunate situations properly by following best approach.

Let’s known about an error message that you could have encountered several times while using Microsoft Outlook:

“The file OST_File _Path \outlook.ost is already in use by the maximum number of applications. Close some of the applications, and then try again.”

What could be the real cause for this error message?

Well, there are two causes for encountering the above error message. The first reason is already mentioned in the error message itself. It states that OST file of MS Outlook is accessed by too many applications, hence the above error encounters. The other reason for the above error message is OST file corruption.

How to overcome from such circumstances?

Few important measures should be taken while dealing with this particular error message. Initially close all the applications that are opened and restart the system to fix the Outlook OST file error. If you are getting same error even after restarting system also, then run Scanost.exe tool. The Scanost.exe will scan the OST file and repairs the corrupted OST file. If Sacnost.exe integrity utility also failed and you are completely unable to resolve the issue, then opt any of the efficient OST to PST converter tool. Try Yodot OST to PST Converter software, which is extremely designed to fix error messages that are encountered in Microsoft Outlook OST file.

Best OST to PST Converter tool:

Usually most of the email application users use Yodot OST to PST Converter to convert corrupted OST file to PST file. This application has the ability to resolve several errors that are occurred while working on Exchange OST file. It is a read-only tool that doesn’t modifies the original OST file during conversion process; rather it reads the source file and converts it into a new healthy PST file. The conversion is very simple and you can also restore all your Emails, Contacts, Email attachments, Calendar items, tasks, journals, notes etc. after converting OST to PST file on Windows system. This application is user friendly and it can be used by both non technical and technical persons for fixing issues with OST file.

How to use Yodot OST to PST Converter tool on Windows OS?


  • Install well-known anti-virus application to protect OST file from getting virus infected
  • If you encounter this error message, then first close all applications and restart the system

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