For background information about this process, see Handling SSL Certificate and Key Files.
The Server Migration Utility can copy your certificate file and key file from the source server to the Linux server so that they are ready for use after you migrate the POA.
Select Yes.
Browse to and select the certificate file that you want to copy to Linux.
Browse to and select the key file that you want to copy to Linux.
Click Next.
Continue with Performing the First Stage of Post Office Data Migration.