If you use Outlook for email, calendar, or contacts, you likely rely on PST files to store your data locally. The classic version of Outlook supports PST files with specific size limits and features. The new Outlook for Windows, currently in preview, handles PST files differently and imposes stricter limits. This article explains the key … Read more
You may have switched to the new Outlook for Windows and noticed that some offline features you relied on in classic Outlook are missing or moved. The new Outlook is designed as a connected app, but it still provides limited offline support for reading and composing messages. This article shows exactly where to find offline … Read more
Many users have PST files from older versions of Outlook and want to use them in the new Outlook for Windows. The new Outlook does not directly open or manage PST files the way classic Outlook does. This article explains what PST files are, why the new Outlook handles them differently, and which tasks still … Read more
The new Outlook for Windows, often called Outlook OneNote, currently provides limited offline support. You can read and reply to cached messages, but you cannot compose new messages offline or access most calendar features without a connection. This partial offline mode is a known limitation during the transition from classic Outlook. This article explains exactly … Read more
If you have used classic Outlook for Windows for years, you likely rely on PST files to archive emails, back up data, or move mail between computers. In the new Outlook for Windows, Microsoft changed how local data files are handled. This article explains where PST files are stored in new Outlook, how to open … Read more
Many users switching to the new Outlook for Windows find that certain offline tasks no longer work the same way. The new Outlook is designed as a cloud-first app, which means it relies on a constant internet connection for most operations. This article explains which offline features from classic Outlook are missing or limited in … Read more
You have archived or deleted hundreds of emails from your Outlook mailbox to free up space. But the warning that your mailbox is almost full or over its limit still appears. This happens because Outlook and the Exchange server do not update the mailbox size immediately after a cleanup. The server still sees the old … Read more
You deleted large attachments from Outlook messages expecting the OST file to shrink. Instead, the OST file size stays the same or grows. This happens because Outlook does not automatically reclaim space inside the OST file after removing data. This article explains why the OST file grows, provides a step-by-step method to compact it, and … Read more
You can receive new emails on your Outlook mobile app, but your calendar events refuse to update or appear blank. This split behavior usually points to a partial sync configuration or a permission restriction on the calendar folder. This article explains why the calendar stops syncing while mail continues, and provides the exact steps to … Read more
You have set up color categories in a shared mailbox, but those categories do not appear when another user opens the same mailbox. The categories you assign to emails or calendar items stay visible only to you. This problem occurs because Outlook stores categories in a local data file by default, not on the Exchange … Read more