All Outlook email lost when pointed at a new email server

Question

All Outlook email lost when pointed at a new email server

Denise Clark 0

All Outlook email on my laptop was lost when I changed the mail server. The structure and content of the missing email is still on my iPhone. Is there any way to recover my laptop from my phone?

0 comments

Answer accepted by question author

0 additional answers

Your answer

Answer 1

Ian-T 13,535 Microsoft External Staff Moderator

Hi @Denise Clark

Since the messages are still visible on your iPhone, please do not remove or reconfigure the account on the phone yet, as that may trigger another synchronization.

First, sign in to the old email provider’s webmail in a browser. If the missing messages appear there, they remain on the old server and should be migrated by the old or new email provider. Changing Outlook to point to a different server does not automatically transfer mail from the previous server.

Next, check whether Outlook retained a local data file:

In classic Outlook, select File > Account Settings > Account Settings > Data Files.
Note the locations of any .pst or .ost files.
Close Outlook and make a backup copy of those files before changing anything else.
If you find a .pst, reopen it through File > Open & Export > Open Outlook Data File. Outlook supports opening or importing a .pst and moving its contents into another mailbox.

A .pst may contain locally stored mail, particularly from a POP account. An .ost is normally a synchronized server copy, so its recoverability depends on whether the messages still exist on the corresponding server.

Unfortunately, there is no standard option to restore an entire Outlook mailbox directly from the iPhone. If the messages exist only on the phone, avoid resetting it and contact the previous mail provider or Apple Support before making further changes. Individual important messages can also be forwarded to the new address as a temporary safeguard.

Hope this helps. Have a nice day

Denise Clark 0 Reputation points

2026-10-11T14:53:22.36+00:00

Thank you for the quick reply. Unfortunately, it seems that they were still appearing because they were still on the old email server and then disappeared. I couldn't forward to another email address because the email address was the same. I have a custom domain that was expiring and I was in the process of moving to a new registrar and email host so the email address was identical - I think this is what caused the problem - I wasn't able to create a parallel email in Outlook in which to copy the folders. This went much smoother for my husband because he uses Apple mail - I was able to forward his emails to that address from the new email server without disrupting his email. It seems that with all the technology out there, it should somehow be sensed that an action could lose everything and a warning made. Most of us aren't aware of the details of how all this works and it is nearly impossible to find a human to help anymore. I thought my email was being backed up in OneDrive. It is puzzling that my iPhone email and Outlook on my Windows laptop had identical structure, but the Webmail on the email server didn't show anything at all - I thought they were being downloaded to my laptop and then synced with my phone. Oh, and I followed the instructions the person (which turned out to be AI digital assistant) gave me and I lost everything. Writing this as a warning to others - make absolutely sure you make a backup yourself and then make sure it is there. That is on me - fortunately I had an backup from mid-2025, but I still lost 1.5 years of hard work that I had stored in my email folders. Oh, I was fortunate the calendar didn't sync because it was still intact. So, I am relatively lucky.