Microsoft Outlook categorizes Outlook Data Files into two types: PST and OST files. PST files contain data stored in your personal folders, whereas OST files contain data downloaded off your ...

What data file types does Outlook support? While working with Outlook, you will encounter two data file types: OST and PST. OST (Offline Storage Table) file types allow you to work offline.

Did you log into Microsoft Outlook and noticed nothing looked the way it did yesterday? It could be due to a recent change. Here's how to fix it.

When Outlook has problems opening or items are missing from your inbox, you can use these steps to troubleshoot and fix issues with the data files.