Reduce the size of your mailbox and Outlook Data Files (.pst and …
If you use an Microsoft 365, Exchange, IMAP, or Outlook.com account, a copy of your mailbox is stored in an Offline Outlook Data File (.ost). To reduce the size of your Outlook Data File (.pst) or Offline Outlook Data File (.ost), you can manually compact the data file.
Introduction to Outlook Data Files (.pst and .ost)
This feature allows you to access your previously downloaded or synchronized email messages, calendar information, contacts, and tasks without an internet connection. Certain types of accounts, such as POP accounts, store their information in the Outlook Data File (.pst) format.
Fix your Outlook email connection by repairing your profile
Having trouble connecting to your email from Outlook on your desktop? Follow these steps to let Outlook diagnose and fix errors in your Outlook mail profile that might be causing the issue.
Create an Outlook Data File (.pst) to save your information
This feature allows you to access your previously downloaded or synchronized email messages, calendar information, contacts, and tasks without an internet connection. Certain types of accounts, such as POP accounts, store their information in Outlook Data Files (.pst files).
Open and close Outlook Data Files (.pst) - Microsoft Support
For Microsoft 365, Exchange, and Outlook.com accounts, all of your information is stored on the server, but an offline copy is also stored on your local computer in an Offline Outlook Data File (.ost). For POP and IMAP accounts, you might store …
AutoArchive settings explained - Microsoft Support
AutoArchive settings explained. Applies To. AutoArchive helps manage the space in your mailbox or on the e-mail server that you are using by automatically moving items to an archive location. Depending on the options, AutoArchive completes one or both of the following actions: Moves items from their original location, generally one of your ...
Open and find items in an Outlook Data File (.pst)
If you use a POP or IMAP account, then all of your Outlook information is stored in an Outlook data file, also known as a Personal Folders File (.pst). You might also use an Outlook data file to backup messages or store older items to keep the size of your mailbox small.
Send large files with Outlook - Microsoft Support
There are many cloud storage services to which you can upload and then share large files. Some popular cloud storage services include OneDrive, Dropbox, iCloud, and Google Drive. Once your file is stored in the cloud, you can include a link to the document in your email message.
Open or import items from an offline Outlook Data File (.ost)
Outlook Data Files (.ost) are used when you have an Exchange account and want to work offline or use or use the default Cached Exchange Mode. This type of data file is also used for accounts that you set up with the Outlook Connector for Outlook.com (formerly Hotmail).
Archive older items automatically - Microsoft Support
Keep your Outlook inbox and its folders under control by moving older items you want to keep to an archive. Use AutoArchive to do this automatically. You can change how often AutoArchive runs, where it stores archived items, and how long Outlook keeps items before archiving them.
Find and transfer Outlook data files from one computer to another
Under Hidden files and folders, click the Show hidden files, folders, and drives button. Click OK. Outlook stores backup files containing email, calendars, contacts, tasks, and notes on your computer. Learn how to find them.