Since the USMC SIPR accounts are all on the MCW domain (HCS), the account creation process is different.
USMC MCEN-S account holders.
Proceed to Step 2, as long as your account is valid and up to date. Contact your local ISC for support.
Coordinate with corresponding USMC sponsor and have them submit for an account using the method below.
Follow their local command's policies for obtaining a SIPR account via Remedy.
Once the account is created, user can log in to https://mccast2.mceits.usmc.smil.mil/ and submit a MCCAST Support Request.
Do not proceed to Step 2.