Whatsapp 
Microsoft Windows Server 2013
Microsoft Windows Server 2013
Microsoft Exchange Server 2013. The Standard Edition is limited to 5 mounted databases per server. A mounted database is a database in use. A mounted database can be an active mailbox database mounted for use by clients or a passive mailbox database mounted during recovery for playback and log replication. Even though it is possible to create more databases than the previously indicated limits, it is possible to mount the maximum number specified above. The recovery database counts towards this limit.
Key valid for 1 device - No expiration date