I am after some clarification regarding SMIME on Office 365.
We are running O365, currently there is no AD sync or ADFS.
We have customers (only 2) who will require us to communicate with them using SMIME.
Am I right in assuming that in order to do this they would have to send us there cert (assuming they generate their own) and apply that to their external contact in AD (via LDP), and then sync our AD with Azure AD. We would then be able to select that external contact and select their cert to encrypt the message.
I also assume we would need at least dirsync in place between our directories.
Are my assumptions correct or am I making an ass out ......well, myself!