I have upgraded to windows 10 pro so i can join my university domain but the join domain button is not there on the settings>about screen. i reinstalled and restarted on the advuce of microsoft but no change. Help! are there other ways to join another domain?

Settings>accounts>access work or school

Click on Join this device to a local Active Directory domain. 

You must get a Join a domain prompt then.

Moderator’s note: Information updated in this reply to help users with latest info.