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In moodle we use bulk action for user
in it New Filter option how to we filter as department wise.
James, from our Customer Community team wrote an article actually on bulk user actions in Moodle:
Running bulk user actions in Moodle
It looks like the only filter he was referring to was filtering by username, but you need to filter by a department?
I looked at the official moodle documentation here:
Bulk user actions
... and it states:
If you know them, choose your users from the available list or else click Show Advanced to create a filter. Users can be filtered according to full name, surname, first name, email address, city/town, country, confirmed, first access, last access, last login, username, authentication. If you have set a custom profile field, this is available too from the "Profile" dropdown box Select users from the list.
If what you want to do can actually be done, most likely it will be by using the Advanced options.