Cannot access WorkMail Automatic response

I apologize for the inconvenience you're experiencing with the Automatic Response feature in Amazon WorkMail. This issue seems to be specific to one account in your organization, which suggests it might be an isolated problem rather than a widespread platform issue.

To troubleshoot this problem, consider the following steps:

1. First, ensure that the user's account is properly configured and has the necessary permissions. Although you mentioned there are no specific restrictions, it's worth double-checking the user's settings and permissions within the WorkMail admin console.

2. Try clearing the browser cache and cookies for the affected user, or have them attempt to access the Automatic Response feature using a different browser or device. This can help determine if it's a client-side issue.

3. If the problem persists, it may be helpful to review the WorkMail audit logs, particularly the authentication logs and mailbox access logs. These logs can provide insights into any issues related to the user's account or access to specific features.

4. Consider temporarily disabling and re-enabling the user's account in the WorkMail admin console. This action might reset some settings and potentially resolve the issue.

5. If none of the above steps resolve the problem, it's recommended to contact AWS Support. They can investigate the specific account and determine if there's an underlying issue with the WorkMail platform affecting this particular user.

Remember that the Automatic Response feature in WorkMail is designed to allow users to set out-of-office messages easily. If this feature is not functioning correctly for a specific user, it's important to address it promptly to ensure the user can utilize this core functionality of the email service.
Sources
Signing in to the Amazon WorkMail web client - Amazon WorkMail
An Introduction to Amazon WorkMail Audit Logging | AWS Messaging & Targeting Blog