Hi @Gurudas ,
The General steps can be as follows:
Go to File > Open & Export > Import/Export:
Choose Export to a file, click Next, choose Outlook Data File(.pst), click Next and then select the mailbox, click Next and specify a location to save the PST file. For more details about the exporting process in Outlook, hopefully you can find the link below helpful: Back up your email
Then you can restore later by importing.
Hope above can help you!
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