encrypt/decrypt after marshmallow update?

does anyone see a decryption option after performing a full device encryption on Marshmallow?

I am talking about a whole device encrypt/decrypt within MM and Not just an sd card procedure...

I updated an unencrypted LL Note 4 to MM, and now wonder if I can now encrypt the whole device with the option to later decrypt whole device within MM itself?

from xda-developers http://ift.tt/1TP96we
via IFTTT