When using the connection string option, it has no ''DB Name'' to pull from (usually the Server name of the DB-server hosting the ''SA'' database/schema). So the name ''sa_db_host'' is a default from HP for this situation.

You can add a ''New'' DB Server to the list of servers and use the SAME connection string and give it the desired ''db server'' name.

You may need to do REMOVE/ edit DBID/ RESTORE on your projects to get them to use the correct ''db server name'' if not already using the one you are adding.

QC/ALM Version 11.50 and later also has a NEW project (likely hidden on your server) called LAB_Project.
If you look in the PROJECTS table in the ''SA'' schema (qcsiteadmin_db), you will see if any projects are using the ''sa_db_host'' db server name and have the DBA change them to the ''correct one''. You DO need to change the one for LAB_PROJECT at least.

Normal projects can get the server name changed by the REMOVE/edit DBID/RESTORE process.

Once ALL projects (including LAB_PROJECT) are pointing to the NEW dbserver, you can delete the old one ''sa_db_host'' from your DB Servers list and it will allow the deletion -- Site Admin will not allow you to delete it if ANY projects are using it.