If you goto
www.yourdomain.com(www.yourdomain.com) and it is the interface for OS tickets, then you would go to www.yourdomain.com/scp(www.yourdomain.com/scp) to access the admin panel. If your OS ticket implementation is not installed in the root then it would be the name of your install directory/scp.
example:
www.yourdomain.com/support(www.yourdomain.com/support) is where customers go to open tickets / update tickets / view status.
www.yourdomain.com/support/scp(www.yourdomain.com/support/scp) is where staff would go to process tickets.
If you do not have a /scp directory then perhaps someone in your company renamed the folder or did something else bad. By default there are only 6 folders in your main installation. They are api, images, include, scp, setup (this should have been deleted), and styles. If you go and take a look at your directory tree you should be able to figure out what they renamed it to pretty easily.
If you are saying that you do not know the username and password to get into your OST installation you will need CLI access to MySQL or a web interface that lets you look at and issue queries. You want to look at the ost_staff table. staff_id 1 is the admin user. You cannot recover the password this way you will need to update it to something that you do know. Here is the SQL query I use to reset that password
UPDATE `ost_staff` SET `passwd` = MD5( 'password' ) WHERE `username`='theusername' LIMIT 1;
Obv. change "password" to what you want the password to be, and change "theusername" to the username of the account. Alternatively you could do:
UPDATE `ost_staff` SET `passwd` = MD5( 'password' ) WHERE `staff_id`='1';
note on both of those, if you chose a different table prefix other than ost_ you will need to change that to what you did choose. Just looking at the database should tell you that pretty quickly.
