Encrypted emails in Microsoft’s older email client—called “classic Outlook” as opposed to “new Outlook”—have once again ...

If you open MS Outlook and see an error message, Outlook is using an old copy of your Outlook data file (.ost), then use ...

Several Outlook users, on different forums, have reported encountering the error “OST file cannot be opened,” when trying to open the application or sending ...

Has this ever happened to you: you open your inbox and see the “cannot open your Outlook data file” error? And you found that your years of emails, contacts, and attachments were suddenly gone. I have ...

As announced, Microsoft has integrated a function into its new Outlook to open the PST files of the classic version. Firstly, you must be subscribed to Microsoft 365 and have also connected the ...

Microsoft is investigating a known issue that triggers Outlook errors when opening encrypted emails sent from other organizations. According to a recently published support document, this issue ...

When using Microsoft Outlook, you may encounter the frustrating error message: “Out of memory or system resources. Close some windows or programs and try again ...

This post helps to fix the 0x8000fff error in Outlook when adding data files. Some users have reported that when they attempt to create or open an Outlook Data File ...

Whenever I try to open certain PST files, even ones I know are valid and working in Outlook, I get an error saying: "Invalid PST format." This prevents me from extracting or accessing any content.

I'm having an issue with the "Convert OST to PST" Windows application. Every time I try to convert an OST file, I get an error saying "OST file is corrupted" - even though the file opens fine in ...

Forbes contributors publish independent expert analyses and insights. Davey Winder is a veteran cybersecurity writer, hacker and analyst. Microsoft has now confirmed that, with effect in “early July,” ...