Recover and restore deleted items in Outlook - Microsoft Support
When you accidentally delete Outlook items, such as email messages, calendar appointments, contacts, or tasks, you can often recover them if they are in your Deleted Items or Junk Email folders. In some cases, you can even recover items after the Deleted Items folder is emptied.
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.
Restore or recover a deleted contact in Outlook
If you accidentally delete a contact or a contact list in new Outlook, you can restore the contact or contact list if it's still in your Deleted folder on the People page. In some cases, you can even recover a contact or contact list after it's removed from the Deleted folder.
Fix your Outlook email connection by repairing your profile
Follow these steps to let Outlook diagnose and fix errors in your Outlook mail profile that might be causing the issue. Do you have a Microsoft 365 account? The Microsoft Support and Recovery Assistant can diagnose and fix several Outlook issues …
Import or copy the AutoComplete list to another computer
Step 1: Copy the Auto-Complete file from the old computer. Because the default folder is hidden folder, the easiest way to open the folder is to use the command %APPDATA%\Microsoft\Outlook in the Windows Search box (or, browse to C:\Users\ username \AppData\Roaming\Microsoft\Outlook).
Recall an email message that you sent in Outlook
Select the link in that message to see whether your recall has succeeded, is pending, or failed. With message recall, a message that you sent is retrieved from the mailboxes of the recipients who haven’t yet opened it. You can also substitute a replacement 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).
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.
Open and find items in an Outlook Data File (.pst)
Back up, restore, or delete items using AutoArchive. Archive items manually. Describes how to investigate items in an Outlook Data File (.pst) and troubleshoot search issues.
Find and transfer Outlook data files from one computer to another
For Microsoft 365 accounts, Exchange accounts, or Outlook.com, Hotmail.com, or Live.com accounts not accessed by POP or IMAP, the following information can be transferred from one computer to another.
Show a declined meeting on my calendar - Microsoft Support
You'll see the declined event across the various Outlook calendar services (such as Outlook for Windows, Outlook for Mac, the web versions of Outlook, Outlook for Android or iOS, Microsoft Teams, and even third-party calendar apps).