Microsoft
  SharePoint Online authentication setup
    Microsoft
  SharePoint Online
 authentication setupThe following instructions do not apply when you configure 
Microsoft
  SharePoint Online
 using Modern Authentication. For Kerberos constrained delegation (KCD), which allows for single sign-on credential-less access to network resources from devices, only Active Directory Federation Service (ADFS) authentication to Microsoft
  SharePoint Online
 is supported.Configure delegation using the 
BEMS
 service account (for example, BEMSAdmin). When adding Kerberos delegation constraints for Docs
 service users, add the ADFS server HTTP service. Do not add Microsoft
  SharePoint Online
 servers for delegation here.For non-KCD configurations, where users enter their credentials on the device, both DirSync with Password Hash and ADFS authentication mechanisms to 
Microsoft
  SharePoint Online
 are supported. No extra authentication-related steps are required to use this configuration.ADFS version and location
      Refer to the version of 
Microsoft
  Windows
that is installed in your environment to verify which version of ADFS is required. The ADFS server is automatically identified by the Docs
 service based on the Microsoft
  SharePoint Online
 location and does not need to be specified.ADFS HTTPS certificate
      If your ADFS server uses a self-signed certificate for HTTPS communication, the certificate must be added as a trusted CA on the computer hosting 
BEMS
.To add the certificate, navigate to the 
Microsoft
 IIS Manager on the computer hosting ADFS, then go to Server Certificates and export the certificate to a file. On the computer hosting BEMS
, import this certificate into the trusted CA list.Once you deploy 
Microsoft
  SharePoint Online
, you’re ready to configure the Docs
 service for your Microsoft
  SharePoint Online
 users.