Select the account that this task will run under. If required, you can run different tasks under different accounts. This may be useful if you have different Exchange Server environments.
. If you do not want this task to log on as the Vault Service Account, select and then click to pick from the list of accounts. Enter the account's password and confirm it. The account you pick must have appropriate permissions.
See Creating the Vault Service account.
Also, the Vault Service account must have the permission "Replace a process level token".