can an Outlook pst from Office 2010 be imported to use on Office 2021 for mac successfully and how to do this.

Yes, you can import a PST file from Office 2010 into Office 2021 for Mac, but there is a specific process you need to follow due to the format of the PST file. Outlook for Mac does not support importing ANSI PST files, which are typically created by older versions of Outlook, including Office 2010.

To successfully import your PST file into Outlook for Mac 2021, you will need to convert the ANSI PST file into a Unicode PST file. Here’s how you can do this:

1. Open Outlook 2010 on your Windows PC.
2. Select File > Open > Open Outlook Data File and choose your ANSI PST file.
3. In the Navigation Pane, select the root of the ANSI PST file.
4. Go to File > Options > Advanced.
5. Click on Export, then select Export to a file and click Next.
6. Choose Outlook Data File (.pst) and click Next.
7. Ensure the root of the ANSI PST file is selected and that Include subfolders is checked, then click Next.
8. Select a location to save the new PST file, enter a file name, and click OK.
9. Click Finish. You may enter a password for the PST if you wish (this is optional).
10. This will create a Unicode PST file that can be imported into Outlook for Mac.
11. Finally, open Outlook for Mac and import the newly created Unicode PST file.

By following these steps, you should be able to successfully import your Outlook data into Office 2021 for Mac.

You should have no problems importing an Outlook 2010 for Windows PST using Legacy Outlook for Mac 2021.

https://support.microsoft.com/en-us/office/import-a-pst-file-into-outlook-for-mac-from-outlook-for-windows-b4a6a1d6-94bb-4c85-a4fc-a83dc690e18c

You can ignore the Q&A Assist blabbering about "ANSI PST" unless you created the PST in a version of Outlook for Windows before 2003 and never converted it to the default 2010 PST format (Unicode).