After enabling EEM integration, the "OS-Use Operating System Authentication" option is missing under the Access Type's Validation Type setting
Service Desk Manager 14.1 and 17.x
All Supported Operating Systems
Behavior described is to be expected.
Authentication Type of Access Type "OS-Use Operating System Authentication" will be replaced with "CA EEM - CA Embedded Entitlements Manager" when EEM security options are enabled.
If you wish to restore the 'OS-Use Operating System Authentication' authentication option, you will need to remove/turn off the EEM options via Options Manager and restart the CA SDM service for the changes to take effect.