The administrator has restored an existing database to a new ePO 5.x installation, without replacing the needed keystore.

During installation, ePO checks to see if a known value in the database keystore can be decrypted. If decryption is not possible, the ePO keystore either has been changed or is corrupted.

As a result:

• Many of the passwords in ePO are unable to be decrypted
  And
• Agents are no longer able to communicate to the ePO Server.