In Object Explorer, connect to the server instance that hosts the availability replica on which you want to resume a database, and expand the server tree.
Expand the AlwaysOn High Availability node and the Availability Groups node.
Expand the availability group.
Expand the Availability Databases node, right-click the database, and click Resume Data Movement.
In the Resume Data Movement dialog box, click OK.
To resume a secondary database that was suspended locally
Connect to the server instance that hosts the secondary replica whose database you want to resume.
Resume the secondary database by using the following ALTER DATABASE statement:
ALTER DATABASE database_name SET HADR RESUME