When a SQL Server 2012 or SQL Server 2014 database contains a large transaction log file, you cannot restore the database in the Microsoft Azure binary large objects (BLOB) storage service. For example, if the transaction log file is so large that it takes longer than 3 minutes to restore it, you cannot restore the database.
The issue was first fixed in the following cumulative update of SQL Server.
Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server: