i have moodle 2.7 external database synchronization after making synchronization command there is some changes on external db but moodle db not affected (student and teachers still in moodle db )
They will not be removed from the database but are they still listed in the user's list in moodle? Also, what do you have for the setting Removed Ext User?
i loose the old semester enrollment data (users cannot there old data ) ... i read data from external data base (oracle view )
what option must i set to avoid loose old enrollment data ???
If you unenroll students from courses, they will not have access to their data. As you have noticed it is still there- you will need to reenroll them and select the setting to restore grades.