Domain Controller downtime
If the ActiveControl Domain Controller is unavailable, then no Business Tasks will be getting updated that will require integration.
As a result Domain Controller downtime will have no negative impact on the HPSM system.
If HPSM is down, then the send program will mark the relevant transaction records as a failed one to process later until it reached the maximum number of retries.
As such, during planned/unplanned downtime, it is best to pause the job scheduled for /BTI/TE_INTEG_SEND until such time as HPSM is back up.