How to active Windows Server 2016:
                    1. run CMD (admin)
                    2. slmgr.vbs /ipk 
                    3. slmgr.vbs /skms kms.digiboy.ir
                    4. slmgr.vbs /ato

Use following Keys:

 DATACENTER - CB7KF-BWN84-R7R2Y-793K2-8XDDG 
 STANDARD - WC2BQ-8NRM3-FDDYY-2BFGV-KHKQY
 ESSENTIAL - JCKRF-N37P4-C2D82-9YXRT-4M63B