End User’s Certificate: This certificate is used for signing and encrypting the message issued from Certificate Authoritiesīefore enlisting the steps, please note that only SST will be used for S/MIME certificate validation in Exchange Online.ġ.SST file from the certificate store (steps are mentioned below). SST FILE: This file consists of all the root and intermediate certificates which are used while validating S/MIME message in Office 365. In Exchange Online, all users are hosted on cloud and there is no on-premise Exchange organization. Enables the end user to compose, encrypt, decrypt, read and digitally sign emails between users of an organization or two different organizations.īelow find easily understandable configuration steps which you need to follow to configure S/MIME for Exchange Online Only and Exchange Hybrid.Enhanced privacy and data security for electronic messaging.Provide cryptographic security services such as message integrity, authentication and non-repudiation of origin.
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