There may be issues when you are trying to access Outlook or send & receive emails or due to Outlook crash which leads to corrupt or damaged PST file. To eliminate the corruption from your PST file, you need to repair the corrupt Outlook PST file. Use the most recommended software is Stellar Phoenix Outlook PST Repair which repairs your corrupt Outlook PST file and restores all mailbox contents.
Check out the easy way to Export Thunderbird to MS Outlook. It can be done effectively by using manual method and if you are not much into coding then you can definitely try the third party tool for the conversion.
This tutorial is about creating a new Microsoft Online User Profile account along with how to transfer your files and settings. You may be faced with this situation if your existing user profile has become corrupted.