Hi,

If you have a PST file from the old computer and a PST file from your Outlook account (the current one), then you can simply merge them using the below-mentioned utility and get both your inboxes in a single one. 

If you don’t have a PST file for the new Outlook account (2021), then follow the steps below to create a PST file. 

Firstly, open Outlook. After that, click on the File option from the top of the left pane.Then, click the Open & Export option and select Import/Export from the options. Now select the Export to a file option and click Next. Then select Outlook data file .pst.Now select the folder or whole Outlook account you want to export in PST. (You must check the Include subfolder option). Now browse the location to save the resultant PST file and click Finish.

And this is how you will get the PST file for your new account.

Now, when you have both PSTs, use the Weeom PST Merge Tool.  This utility offers two user-centric options:   

Merge PST Files: Merge PST files option is used to merge multiple PST files into one PST along with a single folder hierarchy for all selected PST files, which means it merges items of similar name folders into one folder.

Join PST Files: The join PST files option is used to join two or more PST files into a single PST file along with a separate folder hierarchy for each selected PST file.

The Merge PST File option is for you as it will merge both inboxes as per your requirements. Now, add the new (merged) PST to your Outlook account.

This utility can also directly merge OST files to PST, resulting in a PST file.

​Hi, If you have a PST file from the old computer and a PST file from your Outlook account (the current one), then you can simply merge them using the below-mentioned utility and get both your inboxes in a single one.  If you don’t have a PST file for the new Outlook account (2021), then follow the steps below to create a PST file.  Firstly, open Outlook. After that, click on the File option from the top of the left pane.Then, click the Open & Export option and select Import/Export from the options. Now select the Export to a file option and click Next. Then select Outlook data file .pst.Now select the folder or whole Outlook account you want to export in PST. (You must check the Include subfolder option). Now browse the location to save the resultant PST file and click Finish. And this is how you will get the PST file for your new account. Now, when you have both PSTs, use the Weeom PST Merge Tool.  This utility offers two user-centric options:    Merge PST Files: Merge PST files option is used to merge multiple PST files into one PST along with a single folder hierarchy for all selected PST files, which means it merges items of similar name folders into one folder.  Join PST Files: The join PST files option is used to join two or more PST files into a single PST file along with a separate folder hierarchy for each selected PST file. The Merge PST File option is for you as it will merge both inboxes as per your requirements. Now, add the new (merged) PST to your Outlook account. This utility can also directly merge OST files to PST, resulting in a PST file.   Read More

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