Repair Outlook Data Files (.pst and .ost) - Microsoft Support
Select the Data Files tab. All Outlook Data Files (.pst) and Offline Data Files (.ost) are listed along with the name of the account the files are associated with. If you cannot open your Outlook data file or suspect that the file is damaged, use the Inbox Repair tool (scanpst.exe) to repair errors in the file.
Applies To:
Outlook for Microsoft 365, Outlook 2021, Outlook 2019, Outlook 2016
Introduction to Outlook Data Files (.pst and .ost)
The fastest way to open the folder where your Outlook Data Files (.pst and .ost) are saved is to do the following: In Outlook, select the File tab, then on the Info tab, select Account Settings > Account Settings. Select the Data Files tab, select an entry in the table, and then click Open Folder Location.
Applies To:
Outlook for Microsoft 365, Outlook 2021, Outlook 2019, Outlook 2016, Outlook 2013
Open and close Outlook Data Files (.pst) - Microsoft Support
Select File > Open & Export > Open Outlook Data File. Note: Depending on how Outlook is set up, it's likely the folder where the .pst file is stored will open automatically. If it doesn't, browse to the file's location.
Applies To:
Outlook for Microsoft 365, Outlook 2021, Outlook 2019, Outlook 2016, Outlook 2013
Create an Outlook Data File (.pst) to save your information
Create Outlook Data Files (.pst) on your computer to save Outlook items by account, project, or to archive older items.
Applies To:
Outlook for Microsoft 365, Outlook 2021, Outlook 2019, Outlook 2016, Office for business
Outlook blocked access to the following potentially unsafe attachments
For example, an executable file that has the file name extension .exe could be renamed as a Word 97 file that has a .doc file name extension. Ask the sender to resend the renamed attachment to you. After you receive the renamed attachment, you can save it to your computer and rename the file again to use the original file name extension. ...
Repair Outlook Data Files (.pst and .ost) - Microsoft Support
All Outlook Data Files (.pst) and Offline Data Files (.ost) are listed along with the name of the account the files are associated with. If you cannot open your Outlook data file or suspect that the file is damaged, use the Inbox Repair tool (scanpst.exe) to repair errors in the file.
Applies To:
Outlook for Microsoft 365, Outlook 2021, Outlook 2019, Outlook 2016
Open Office apps in safe mode on a Windows PC - Microsoft Support
Use the /safe option to open an Office application. If you can't start a Microsoft Office application in Office Safe Mode or you have recurring problems opening applications in normal mode, you can try to repair Office. For more information, go to Repair an Office application.
Applies To:
Office 2021, Office 2019, Office 2016, Office 2013
File types supported for previewing files in OneDrive, SharePoint, and ...
Images: AI, BMP, EMF, EPS, GIF, JPG, JPEG, PNG, PSD, SVG, TIF, TIFF, WMF. SharePoint page: ASPX. If Office Online Server is installed, document preview can be shown in modern document libraries for these file types: Acrobat (PDF), PowerPoint (POTM, POTX, PPSM, PPSX, PPT, PPTM, PPTX), Rich Text (RTF), Word (DOC, DOCM, DOCX, DOTM, DOTX).
Applies To:
SharePoint Server Subscription Edition, SharePoint in Microsoft 365, Microsoft 365 admin, OneDrive (work or school), OneDrive (home or personal), OneDrive for Windows
Common file name extensions in Windows - Microsoft Support
In File Explorer under View, in the Show/hide group, select the File name extensions check box. Below is a list of common Windows file name extensions and formats. Learn what file name extensions are, which extensions are common in Windows, and how to view them in File Explorer.
Use the System File Checker tool to repair missing or corrupted system ...
Describes how to use the System File Checker tool to troubleshoot missing or corrupted system files in Windows 8.1, Windows 8, Windows 7 or Windows Vista.