diff --git a/src/api/core/mod.rs b/src/api/core/mod.rs
index 9d6df4f2..30713517 100644
--- a/src/api/core/mod.rs
+++ b/src/api/core/mod.rs
@@ -68,6 +68,7 @@ pub fn routes() -> Vec<Route> {
         get_collection_users,
         post_organization,
         post_organization_collections,
+        post_organization_collection_delete_user,
         post_organization_collection_update,
         post_organization_collection_delete,
         post_collections_update,
diff --git a/src/api/core/organizations.rs b/src/api/core/organizations.rs
index 4747e8e5..4cba2949 100644
--- a/src/api/core/organizations.rs
+++ b/src/api/core/organizations.rs
@@ -192,6 +192,33 @@ fn post_organization_collection_update(org_id: String, col_id: String, headers:
     Ok(Json(collection.to_json()))
 }
 
+#[post("/organizations/<org_id>/collections/<col_id>/delete-user/<org_user_id>")]
+fn post_organization_collection_delete_user(org_id: String, col_id: String, org_user_id: String, headers: AdminHeaders, conn: DbConn) -> EmptyResult {
+    let collection = match Collection::find_by_uuid(&col_id, &conn) {
+        None => err!("Collection not found"),
+        Some(collection) => if collection.org_uuid == org_id {
+            collection
+        } else {
+            err!("Collection and Organization id do not match")
+        }
+    };
+
+    match UserOrganization::find_by_uuid(&org_user_id, &conn) {
+        None => err!("User not found in organization"),
+        Some(user_org) => {
+            match CollectionUser::find_by_collection_and_user(&collection.uuid, &user_org.user_uuid, &conn) {
+                None => err!("User not assigned to collection"),
+                Some(col_user) => {
+                    match col_user.delete(&conn) {
+                        Ok(()) => Ok(()),
+                        Err(_) => err!("Failed removing user from collection")
+                    }
+                }
+            }
+        }
+    }
+}
+
 #[derive(Deserialize, Debug)]
 #[allow(non_snake_case)]
 struct DeleteCollectionData {
@@ -232,26 +259,21 @@ fn get_org_collection_detail(org_id: String, coll_id: String, headers: AdminHead
 #[get("/organizations/<org_id>/collections/<coll_id>/users")]
 fn get_collection_users(org_id: String, coll_id: String, headers: AdminHeaders, conn: DbConn) -> JsonResult {
     // Get org and collection, check that collection is from org
+    let collection = match Collection::find_by_uuid_and_org(&coll_id, &org_id, &conn) {
+        None => err!("Collection not found in Organization"),
+        Some(collection) => collection
+    };
 
     // Get the users from collection
-
-    /*
-    The elements from the data array to return have the following structure
-
-    {
-        OrganizationUserId:	<id>
-        AccessAll:	true
-        Name:	    <user_name>
-        Email:	    <user_email>
-        Type:	    0
-        Status:	    2
-        ReadOnly:	false
-        Object:	    collectionUser
-    }
-    */
+    let user_list: Vec<Value> = CollectionUser::find_by_collection(&collection.uuid, &conn)
+    .iter().map(|col_user|  {
+        UserOrganization::find_by_user_and_org(&col_user.user_uuid, &org_id, &conn)
+        .unwrap()
+        .to_json_collection_user_details(&col_user.read_only, &conn)
+    }).collect();
 
     Ok(Json(json!({
-        "Data": [],
+        "Data": user_list,
         "Object": "list"
     })))
 }
@@ -473,8 +495,11 @@ fn edit_user(org_id: String, user_id: String, data: Json<EditUserData>, headers:
     user_to_edit.type_ = new_type;
 
     // Delete all the odd collections
-    for c in Collection::find_by_organization_and_user_uuid(&org_id, &user_to_edit.user_uuid, &conn) {
-        CollectionUser::delete(&user_to_edit.user_uuid, &c.uuid, &conn);
+    for c in CollectionUser::find_by_organization_and_user_uuid(&org_id, &user_to_edit.user_uuid, &conn) {
+        match c.delete(&conn) {
+            Ok(()) => (),
+            Err(_) => err!("Failed deleting old collection assignment")
+        }
     }
 
     // If no accessAll, add the collections received
diff --git a/src/db/models/collection.rs b/src/db/models/collection.rs
index c2c49769..ed741ba0 100644
--- a/src/db/models/collection.rs
+++ b/src/db/models/collection.rs
@@ -188,14 +188,26 @@ impl CollectionUser {
         )).execute(&**conn).and(Ok(()))
     }
 
-    pub fn delete(user_uuid: &str, collection_uuid: &str, conn: &DbConn) -> bool {
-        match diesel::delete(users_collections::table
-            .filter(users_collections::user_uuid.eq(user_uuid))
-            .filter(users_collections::collection_uuid.eq(collection_uuid)))
-            .execute(&**conn) {
-            Ok(1) => true, // One row deleted
-            _ => false,
-        }
+    pub fn delete(self, conn: &DbConn) -> QueryResult<()> {
+        diesel::delete(users_collections::table
+        .filter(users_collections::user_uuid.eq(&self.user_uuid))
+        .filter(users_collections::collection_uuid.eq(&self.collection_uuid)))
+        .execute(&**conn).and(Ok(()))
+    }
+
+    pub fn find_by_collection(collection_uuid: &str, conn: &DbConn) -> Vec<Self> {
+        users_collections::table
+        .filter(users_collections::collection_uuid.eq(collection_uuid))
+        .select(users_collections::all_columns)
+        .load::<Self>(&**conn).expect("Error loading users_collections")
+    }
+
+    pub fn find_by_collection_and_user(collection_uuid: &str, user_uuid: &str, conn: &DbConn) -> Option<Self> {
+        users_collections::table
+        .filter(users_collections::collection_uuid.eq(collection_uuid))
+        .filter(users_collections::user_uuid.eq(user_uuid))
+        .select(users_collections::all_columns)
+        .first::<Self>(&**conn).ok()
     }
 
     pub fn delete_all_by_collection(collection_uuid: &str, conn: &DbConn) -> QueryResult<()> {
diff --git a/src/db/models/organization.rs b/src/db/models/organization.rs
index 64053cfb..17599000 100644
--- a/src/db/models/organization.rs
+++ b/src/db/models/organization.rs
@@ -189,6 +189,22 @@ impl UserOrganization {
         })
     }
 
+    pub fn to_json_collection_user_details(&self, read_only: &bool, conn: &DbConn) -> JsonValue {
+        use super::User;
+        let user = User::find_by_uuid(&self.user_uuid, conn).unwrap();
+
+        json!({
+            "OrganizationUserId": self.uuid,
+            "AccessAll": self.access_all,
+            "Name": user.name,
+            "Email": user.email,
+            "Type": self.type_,
+            "Status": self.status,
+            "ReadOnly": read_only,
+            "Object": "collectionUser",
+        })
+    }
+
     pub fn to_json_details(&self, conn: &DbConn) -> JsonValue {        
         let coll_uuids = if self.access_all { 
             vec![] // If we have complete access, no need to fill the array