Having read in a book of Patrick LeBlank "Microsoft® SQL Server® 2012 Step by Step":
"Benefits and limitations of contained databases
As with most features, there are benefits and limitations to contained database security. Most of the limitations are specific to containment’s operability with other SQL Server features. If database containment is enabled, you cannot use change data capture, change tracking, and replication"
does setting "Enable contained Databases" to
True on server
incur limitations on the whole server, the instance of server or specific database created as contained one?
Apparently, it is only to contained database but, then, why it should be enabled server-wide first?
and what does it incur (for example, if I enable it on server but did not enable it on any particular database)?