Then, you are at the right place and rather at the right web page where you will not only find the steps and instructions to be followed and performed during the recovery process, but will also see the relevant screenshot at each successive step. This lets you clearly understand the whole process thoroughly. This is the coolest thing about your association with us, as you get to know the entire process much before you actually start it on your system.
Part 1 : Remove Encryption from OST file (S/MIME-Open PGP with Single Key)
Part 2 : Decrypt OST file Encryption (S/MIME-Open PGP with Multiple Keys)