Hello,
Thank you so much for posting here.
According to our research, Certificates are commonly issued as PFX files. If you have a certificate in another format, you can convert it to PFX. If the CA issued an .spc and its keys in non-.pfx files, you must convert and store the files in a .pfx file before they can be used for release-signing. The Pvk2Pfx tool is used to perform this conversion.
We could kindly have a check whether the information is helpful. For any question, please feel free to contact us.
Best regards,
Hannah Xiong
============================================
If the Answer is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.