When multiple recipient email addresses are configured in the Application Control Policy Change Request's "Email Requests" field, the following error is shown when attempting to send a request from an endpoint
Failed to send the email. Please ensure the extended MAPI client has been installed
This issue occurs when the Policy Change Request's "Email Requests" field has been configured to send emails to multiple recipients in the Application Control Configuration. For example:
To resolve this, ensure that only one address is specified in this field. If multiple recipients are required, a mail group can be created and the address of the group can be used.