WorkMail / Org / ... / migrator - keeping disabled

This issue appears to be related to the migration administrator settings in Amazon WorkMail. When you're trying to set up a migration administrator user but the settings don't persist (reverting to "Disabled" even though the console initially shows success), there could be a few potential causes:

1. The user you're trying to set as the migration administrator might not be properly enabled in Amazon WorkMail. Before a user can be set as a migration administrator, they must be fully enabled in the system.

2. You might need to follow the complete migration setup process:

• First, create a dedicated user to act as the migration administrator (or use an existing user)
• Enable this user for Amazon WorkMail
• Navigate to Organization settings > Migration
• Move the "Migration enabled" slider to the ON position
• Select your migration administrator from the dropdown
• Save the settings

3. If the settings continue to revert, there might be a permissions issue with your AWS account or a service quota limitation affecting your WorkMail organization.

If you've followed these steps and the issue persists, it could potentially be a service issue. In such cases, you might need to contact AWS Support for further assistance, as this behavior suggests something might be preventing the migration administrator settings from being properly saved in your WorkMail organization.
Sources
Migrating to Amazon WorkMail - Amazon WorkMail
Create WorkMail Organization Fails | AWS re:Post