Changed Domains / lost emails in Outlook

Occasional Visitor



I have a user that used to be an employee in our Canada domain.  She was let go and we scrapped that domain.  She came back to the fold and I set her up in our US domain.  As soon as I did that, she lost her old emails in her old Profile.  I do see her old profile in Appdata but don't know how to tell Outlook to use that OST file?  I am getting mixed signals on how to approach this issue.  Can you offer some suggestions?



2 Replies

Hi @akstorch ,

if you can still open old profile in Outlook, open and just export e-mails to PST. Once exported, you can open new profile and their import PST to US domain, or simply open.


If you can't open old profile, you can use OST to PST converter. Once converted, you can Open PST or import.


If you just google "ost to pst converter" you will get many results. Here is one example tool: Free OST to PST Converter to Export, Migrate & Convert OST to PST ( . 


You can take a look at the documentation: Stellar Converter for OST - EN (


You can use a professional OST to PST Converter Tool to convert OST files into PST easily and effortlessly. It can quickly convert and import  bulk OST files into PST including all the email attachments and mailbox items. This advanced OST to PST Converter can also directly convert and migrate OST files into multiple file formats and email clients on Mac without any data alteration. Users can remove duplicate items from the conversion process and additionally preview the files just before conversion and migration.