Adding a Nabtech mailbox to current Outlook for Windows

Identify whether you are using new Outlook or classic Outlook, since their setup screens differ. Confirm the mailbox works in webmail and have its provider-supplied connection and authentication details ready. Preserve any local-only mail if you are replacing an existing account rather than adding a new one.

1. Obtain the mailbox's secure IMAP and SMTP hostnames, ports, encryption modes and username. Confirm that the mailbox works in webmail.
2. In new Outlook, open the account settings, then Accounts > Your accounts > Add Account. In classic Outlook, use File > Add Account and its advanced/manual setup when needed.
3. Enter the full address and follow the appropriate IMAP setup flow. Use the provider's secure settings and mailbox password rather than assuming Outlook.com server names apply.
4. Review any account synchronisation or provider permission notices before completing setup. Where your organisation restricts cloud synchronisation, confirm that the chosen Outlook edition fits that policy.

Send and receive a small test message and check the From address, Sent folder and synchronised folders against webmail. Verify each account separately when several addresses are configured.

An incorrect SMTP configuration can prevent sending even when incoming mail works. A certificate error should be corrected by checking the hostname and certificate, not bypassed. If the account needs provider-specific authentication, use that product's supported sign-in flow.

• Sending business email in current Outlook for Windows
• Checking for new email and fixing Outlook synchronisation delays
• Creating a business mailbox and connecting your email apps
• Troubleshooting email delivery, spam placement and authentication records

• Microsoft: adding an account to Outlook
• Microsoft: Office 2019 lifecycle