If you want to use a self-signed certificate, create one as follows:

1. Obtain the Makecert tool as described in MakeCert. Note that when installing the Windows SDK, you can limit the installation to install makecert.exe only by selecting the option Tools under .Net Development and leaving everything else unchecked.
2. Open an elevated command prompt (with Administrator privileges) and navigate to the location where makecert.exe is stored. Then type:makecert.exe -r -pe -n CN=CertificateName -ss my -sr localmachine -eku 1.3.6.1.5.5.7.3.2 -len 2048 -e 01/01/2016 CertificateName.cerThe certificate will be created and stored in the same location.
3. In the vault, click Manage Certificate to upload the .cer file that contains the public key.

On the server on which you ran makecert.exe, complete the steps in this procedure to export the .cer file in .pfx format.

1. From the Start screen type mmc.exe to start the Microsoft Management Console.
2. On the File menu, click Add/Remove Snap-in. The Add or Remove Snap-ins dialog box appears.
3. In Available snap-ins, click Certificates, and then click Add.
4. Select Computer account, and then click Next.
5. Select Local computer, and then click Finish.
6. In the Microsoft Management Console, in the console tree, expand Certificates, and then expand Personal.
7. In the details pane, click the certificate you want to manage.
8. On the Action menu, point to All Tasks, and then click Export. The Certificate Export Wizard appears. Click Next.
9. On the Export Private Key page, click Yes, export the private key. Click Next. Note that this is only required if you want to export the private key to other servers after the installation.
10. On the Export File Format page, select Personal Information Exchange – PKCS #12 (.PFX). Click Next.
11. On the Password page, type and confirm the password that is used to encrypt the private key. Click Next.
12. Follow the pages of the wizard to export the certificate in .pfx format.

After exporting the server, copy it to the server you want to register, and then import it as follows. Note that you do not need to import the certificate on the server that was used to run MakeCert.exe.

1. Copy the private-key (.pfx) certificate files to a location on the local server.
2. From the Start screen, type mmc.exe, and then press Enter to open the Microsoft Management Console.
3. In Microsoft Management Console, on the File menu, click Add/Remove Snap-in.
4. In the Add/Remove Snap-in dialog box, select Certificates and then click Add.
5. The Certificate snap-in dialog will open, select Computer account and click Next.
6. Select Local Computer and click Finish.
7. You are returned to the Add/Remove Snap-in dialog box, click OK.
8. In the Microsoft Management Console, expand Certificates, right-click Personal, point to All Tasks, and then click Import to start the Certificate Import Wizard.
9. On the Certificate Import Wizard Welcome page, click Next.
10. On the File to Import page, click Browse and locate the folder that contains the .pfx certificate file that contains the certificate that you want to import. Select the appropriate file, and then click Open
11. On the Password page, in the Password box, type the password for the private-key file that you specified in the previous procedure and then click Next.
12. On the Certificate Store page, select Place all certificates in the following store, click Browse, select the Personal store, click OK, and then click Next.
13. On the Completing the Certificate Import Wizard page, click Finish.

After the import, you will be able to select the certificate when you run the Register Server Wizard as part of the Hyper-V Recovery Manager provider Setup.