recover and add old email and accounts to New Outlook

Question

new Outlook e-mail does not include my other email accounts and I can not add accounts or find old e mails

Answer 1

New Outlook for Windows does not automatically bring in all old accounts and data. Both adding accounts and recovering old email depend on how Outlook was used before the change.

To restore access to other email accounts in new Outlook:

1. Open new Outlook.
2. On the View tab, select View settings, or from the File tab select Account info.
3. Select Accounts > Your accounts.
4. Under Email accounts, select Add Account.
5. Either pick one of the suggested accounts or type the email address of the missing account and select Continue.
6. When prompted, enter the password and complete any provider-specific steps (for example, Gmail, Yahoo, or iCloud may require enabling access on their website).
7. After setup completes, the mailbox and its folders will appear in the folder list in new Outlook.

If the account is a third‑party account that was previously connected only in Outlook.com (web):

• Outlook.com no longer supports adding or syncing new third‑party “connected accounts” (like Gmail or Yahoo) directly in Outlook.com. Those accounts must now be added to Outlook clients instead:
  • Use new Outlook for Windows as above, or
  • Use classic Outlook for Windows, or
  • Use Outlook mobile (iOS/Android) and add the accounts there.

To recover old email stored in a local Outlook data file (.pst) using classic Outlook:

If old mail was stored in a local Outlook data file, it must be opened from classic Outlook (not new Outlook) to see those messages and folders.

1. Install or switch to classic Outlook for Windows (if available in the Microsoft 365 installation).
2. In classic Outlook, go to File > Open & Export > Open Outlook Data File.
3. Browse to the .pst file (for example, in C:\Users\\<username>\\Documents\\Outlook Files\\) and select Open.
4. A new folder tree appears in Outlook with all old emails, contacts, and calendar items.

If Gmail mail was previously accessed in Outlook and needs to be migrated into Microsoft 365:

1. In new Outlook (or classic Outlook), add the Gmail account:
   • New Outlook:
     • View > View settings > Accounts > Email accounts > + Add Account.
     • Enter the Gmail address, select Continue, and complete sign‑in.
2. In classic Outlook, export Gmail to a .pst file:
   • File > Open & Export > Import/Export.
   • Choose Export to a file > Outlook Data File (.pst).
   • Select the Gmail account, check Include subfolders, and complete the export.
3. Open or import that .pst into the desired Outlook profile as above.

If none of the above accounts or .pst files exist, old messages may only be available on the original mail server (for example, Outlook.com, Exchange, Gmail, Yahoo). In that case, adding each account directly into new Outlook using Accounts > Your accounts > Add Account is required to see the server‑side mail again.

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References:

• Connected email accounts like Gmail and Yahoo not working in Outlook.com
• Add an email account to Outlook for Windows
• Start using new Outlook for Windows
• Move your old email, calendars, and contacts to Microsoft 365
• How do I recover my old email messages, my contacts and everything else I had in Outlook? - Microsoft Q&A