If you have the Oracle MySQL version of ExWeb then configuration options are:-
MySQL Server connection is set from within ExWeb once the MySQL Server Schema has been installed.
The MySQL connection string dialogue is accessed from the main application toolbar.
Once the dialog opens, click on the MySQL Server tab to open the settings for MySQL Server:
Add the MySQL host name to the 'Server Name' Field:
Then add the MySQL port the default is 3306:
Then add the root admin user name and password:
Finally select the MYSQL database the default schema that ships with ExWeb is Exch_SQL:
Save the settings.