is posible denied to the user change the image or change the image in the client or cand restrict via server nobody show image?
the Enterprise Plugin offers the ability to disable vCard changes for Spark users.
If you are using LDAP as the back-end system for the users then then vCards are read-only.
As there is no plugin available to block vCard updates there is no out-of-the-box solution to do this. And I guess that this solution would prevent the XMPP standard.
I could imagine that changing the vCard field in the DB to VARCHAR(10000) instead of BLOB or whatever it is will cause update errors for users if they try to insert a photo within the vCard. That’'s probably a very evil solution and I have no idea if it works fine.