'Message can't be decrypted' in OWA

windows

Symptoms

Encrypted message will not open in OWA, and the smart card prompt may reappear.

Likely cause

The email address on the CAC does not match the address on the Exchange profile.

Fix

1. Confirm the @mail.mil address on the CAC at https://www.dmdc.osd.mil/self_service. 2. If wrong, update the address there (Replace Certificate) or visit an ID card office. 3. Wait ~30 hours for the new cert to publish to the GAL.

Sourced from militarycac.com. Rewritten for clarity.

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