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.

If your Outlook Exported PST File appears empty, reset the View Settings, repair the PST, or manually export emails to the PST file.

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.