What does SCIM stand for?
Solution: System for CRSF-domain Identity Management
If you want to remove an attribute's value in Okta, for example a value coming from AD that is not useful in any way, you have to:
Solution: Intentionally map a blank value to that specific attribute in the user profile
With Okta you federate the 'Office 365 tenant name' (which is the default Microsoft domain you have) or the 'Office 365 domain'?
Solution: You federate with Okta only the 'Office 365 domain'
Any ...
Solution: Office 365 user
When you are trying to federate (via WS-FED) Office 365 with Okta:
Solution: You can choose to skip importing user groups and group memberships into Okta