Suddenly when try to run Outlook, I get an error message the OST file and when click OK, the error message is closed!
Please read this: ► ... Outlook 2016 cannot open OST file!
and: ... Repair Outlook Data Files
Search for the OST file in your Account Profile Folder, the Outlook OST Repair Tool can help to repair it.
or: ► For Crashes in Windows 10, using System File Checker!
An OST file is a data file created by Microsoft Outlook, its full name is Outlook Storage Table - File. The OST file format was created by Microsoft. An OST file or the file is a Microsoft Exchange Server data file that is created offline. The data file that contains of the related data, calendar, and other items are stored on the Microsoft Exchange Server. However, an email client and personal information manager. It is used to store a copy of mailbox information from an Office 2016 / 365,
FAQ 3: Updated on: April 27th 2018 17:45