This question was migrated from the Microsoft Support Community If the PST file no longer exists I m afraid it cannot be recovered and I https://askoff.ru/question/4 for any inconvenience Now I have lost all my contacts and all my saved messages See our get started article below If you have any further questions please do not hesitate to let us know If you have not synced with the server before but still have a PST data file you can import the backup into Outlook If so you can uninstall New Outlook and then reinstall Office so that you can switch back to your previous Outlook experience Before reinstalling Office please remember to backup important files My outlook https://askoff.ru/question/3 disappeared and a new format came up May I ask if you accidentally switched https://askoff.ru/question/11 New Outlook Welcome to Microsoft https://askoff.ru Find it on Q A the home for technical questions and answers at Microsoft You can vote on whether https://askoff.ru/question/6 s helpful but you can t add comments or replies or follow the question