Workflow
Workflow
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ExtensionsAssignments Manager
Upload → Compare → Select → Validate. A safe workflow for bulk Intune policy assignment changes.
For details: https://docs.intuneassistant.cloud/docs/extensions/assignments-manager/how-it-works/#how-it-works
Assignment Manager is built around a safety-first workflow. You always see what will change before you execute anything—and you always validate after.
Four-step workflow
Upload your desired state in CSV, compare it with the live tenant, choose what to apply, then validate and export results.
Provide a CSV describing the assignment changes.
PolicyName;GroupName;AssignmentDirection;AssignmentAction;Filter;Filter Type
Windows Security Baseline;Finance Department;Include;Add;;
iOS Compliance Policy;All Users;Include;Replace;Corporate Devices;Include
Android App Protection;Sales Team;Include;Remove;;During upload, the tool validates:
Required columns & data types
Obvious conflicts (duplicate rows, invalid actions, etc.)
If the upload check finds issues, you get immediate feedback to fix them. Only the valid rows are processed in the next step. To fix the errors, update your CSV and re-upload.

Each row is evaluated against the live tenant state, so you get a precise preview.
Status compare indicators:
Ready for migration – Row is ready to implement changes
Already migrated – Row is already in the desired state
Check errors - Row has issues that need fixing before migration. This can due an non existing policy/group, invalid filter, or duplicate policy names.
Correct the CSV and re-upload to fix. That means, provide a group that actually exists in Azure AD, or a policy that is already created in Intune. If the group or policy doesn't exist, you can also choose to create it first. Then, after creation, upload the CSV again and start over.

When moving from one target strategy to another, Replace avoids leftover assignments.
Treat migrations as change-controlled artifacts.
Excluding via filters is usually cleaner than managing parallel exclusion groups.
Create Assignment Templates Learn how to create CSV templates for bulk assignment management - manually or by exporting from your reference tenant. https://docs.intuneassistant.cloud/docs/extensions/assignments-manager/create-assignments-template/
Scenarios Bulk manage Microsoft Intune policy assignments using CSV files (add, remove, replace) across tenants. https://docs.intuneassistant.cloud/docs/extensions/assignments-manager/scenarios/