In Control Panel, click or double-click Mail. It is not necessary to back up this file. Offline Outlook Data Files (.ost) are copies of your Exchange information. Re-create an offline Outlook Data File (.ost) Outlook Data Files (.ost) are always copies of items that are saved on a mail server and don’t need to be backed up like Outlook Data Files (.pst). This type of data file is also used for accounts that you set up with the Outlook Connector for (formerly Hotmail). Outlook Data Files (.ost) are used when you have an Exchange account and want to work offline or use or use the default Cached Exchange Mode. Although not required, you can manually move the existing file to the new folder to avoid the download time that is required to re-create the file. Also, if you specify a new folder location for the offline Outlook Data File (.ost), a new file is automatically created.

If problems persist, you should try to contact Microsoft Customer Service.Note: By default, when you add an account that uses an offline Outlook Data File (.ost), the file is automatically created and data from the server is downloaded. Try logging in again to your Outlook account. Click OK, and then restart Internet Explorer. Next, click Start > Run, and enter the following code:.The Use SSL 2.0 and Use SSL 3.0 options should be checked. Scrolling to the Security section and verify that the Check for server certificate revocation option is unchecked.Launching Internet Explorer and clicking Tools > Internet Options > Advanced. If the above two options don't work, you should try checking your Internet Explorer security settings. How to change Internet Explorer security settings to fix Outlook? You can do this by launching Internet Explorer and clicking Tools > Delete Files > Delete Cookies. How to clear Internet Explorer cache to fix Outlook?Īnother solution is to clear your Internet Explorer cache and cookies. Double-click on your PC's clock to verify that your date and time are set correctly make adjustments, if necessary.

If your computer system's date settings are incorrect, it may be causing some confusion in the Outlook server. It may sound odd, but if you're having trouble accessing your Outlook account, it could very well be because the date on your PC needs to be set properly. How to fix date and time on PC to fix Outlook? However, you should be able to use your Hotmail username and password in Outlook. All Hotmail users were migrated to back in 2013. If you are having trouble accessing your email account or are unable to open your inbox, it may be indicative of problems with your security settings, or even an issue with your internet cache.

Change Internet Explorer security settingsĮven after being rebranded from Hotmail to Outlook, this email service remains one on the most popular, and is accessed by millions of people around the world everyday.

Opening a hotmail .inbox file