- AlwaysOn Availability Groups
Nope – You can use failover groups and active geo-replication instead of AG groups. - Linked servers
Nope – You can use Elastic query instead of linked servers. - Event notifications
Nope – You can use alerts instead of the backup command.
This list was taken from Azure SQL Database features 9/22/2017.
Watch for updates as features are added or replaced with alternatives.