Microsoft directs administrators to remove the old Device Features SSO extension assignment after confirming the Platform SSO settings-catalog policy works; keeping both can cause conflicts. A mixed macOS 13 and 14-or-later population needs the respective authentication settings in one profile. For devices with user affinity, Platform SSO assignments must use users or user groups, without assignment filters. Microsoft Learn.
\nInventory the existing SSO payloads and enrollment affinity before building the replacement. Check supported macOS and Company Portal requirements against the source, and select the intended authentication method explicitly.
\nPrepare a migration map from each old assignment to the single intended Platform SSO policy. Include the correct version-specific settings in that policy rather than splitting the same population across competing payloads. Pilot the new configuration with a small authorized group and plan the old assignment’s removal as a separate, recorded checkpoint after verification.
\nConfirm registration and inspect the delivered Platform SSO profile on the test Mac. Exercise the required sign-in and protected application access with its user, then verify that the obsolete extension profile is no longer assigned. Recheck mixed-version and shared-device cases against their own supported assignment paths. If conflicting payloads or unexpected access failures appear, stop expansion and reconcile the actual delivered profiles before changing unrelated authentication controls.
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