This blog is mainly posted to provide effective solutions to fix very common errors “Hotmail.ost is not an Outlook data file“ of Microsoft Outlook. But direct discussing solutions will be incomplete information. So I am going to tell some basic informations before introducing solutions to fix “Hotmail.ost cannot accessed” error.
When you configure a Hotmail account in MS Outlook that time an additional plugin “Microsoft Outlook Hotmail Connector” is required. Once you configure a Hotmail account, MS outlook creates an .ost file to save emails, contacts, notes and calendar items etc. The user can use this OST file to read items even when internet connection is not available.
The OST files created by MS Outlook for Hotmail account works fine until you don’t delete profile or uninstall MS Outlook. But when you reinstall Microsoft Outlook or delete your profile that time OST file gets inaccessible and produces very common errors such as:
This method is very helpful to get rid from Hotmail.ost is not an offline folder or Hotmail.ost cannot be opened. So just follow the steps:
This is another good solution already suggested by many Microsoft MVPs for the same query. So Check if Outlook is running in compatibility mode. Follow the steps:
If the above both methods do not help, then go with this most effective method. By using this reliable method you can fix these errors and access all precious mail with Outlook 2016, 2013, 2010 and 2007 etc.
You can examine these three methods to fix Outlook errors like: Hotmail.ost is not an Outlook data file or Hotmail.ost cannot be opened. The last method is very powerful and works in all conditions even if OST file is corrupted or orphaned. So I will recommend you to use this simple method to regain data from inaccessible OST files. You can also check how to import/open PST file in MS Outlook in another post.