If you want to release multiple service entry sheet at same time you can done it with this t-code ML85.
If you define release strategy for Service entry sheet and want to Multiple Release you can done it with ML85 t-code.
Steps:
Enter T-code ML85
Select your Release Code (Which you want to set for service entry sheet), Release group.
Tick on Set Release check box button.
Click on Not Accepted check box button and click on execute button.
You got list of service entry sheet and release it.
