This message is directly related to SES Licensing alerting threshold that was configured by your Bentley On-site administrator / co-administrator. Before selecting acknowledge, highly suggest that you contact your Bentley On-site administrator / co-administrator to be sure that your existing contract has this application and edition listed. Otherwise, your company will be invoiced for only the time of any software usage not specified on your account. This could amount to huge savings if you only need to use software not covered by your account for a short period of time. Thus reducing the need for an additional license to be permanently added to your contract.
Again, contact your Bentley On-site administrator / co-administrator to be sure before making a selection.