Update meeting

[teo7fuma]

Hi, I have an Admin account in Office365 with full access permission on my rooms. I'm trying to update an event but I have a generic error "An internal server error occurred. The operation failed., Object reference not set to an instance of an object."

Following my code: foreach ($event_updates as $update) { // Build out item change request. $change = new ItemChangeType(); $change->ItemId = new ItemIdType(); $change->ItemId->Id = $update['id']; $change->ItemId->ChangeKey = $update['changekey']; $change->Updates = new NonEmptyArrayOfItemChangeDescriptionsType();

            // Set the updated subject.
            $field = new SetItemFieldType();
            $field->FieldURI = new PathToUnindexedFieldType();
            $field->FieldURI->FieldURI = UnindexedFieldURIType::ITEM_SUBJECT;
            $field->CalendarItem = new CalendarItemType();
            $field->CalendarItem->Subject = $update['subject'];
            $change->Updates->SetItemField[] = $field;

            // Set the updated body.
            $field = new SetItemFieldType();
            $field->FieldURI = new PathToUnindexedFieldType();
            $field->FieldURI->FieldURI = new UnindexedFieldURIType();
            $field->FieldURI->FieldURI->_ = UnindexedFieldURIType::ITEM_BODY;
            $field->CalendarItem = new CalendarItemType();
            $field->CalendarItem->Body = new BodyType();
            $field->CalendarItem->Body->_ = $update['description'];
            $field->CalendarItem->Body->BodyType = BodyTypeType::TEXT;
            $change->Updates->SetItemField[] = $field;

            // Set the updated start time.
            $field = new SetItemFieldType();
            $field->FieldURI = new PathToUnindexedFieldType();
            $field->FieldURI->FieldURI = UnindexedFieldURIType::CALENDAR_START;
            $field->CalendarItem = new CalendarItemType();
            $field->CalendarItem->Start = $update['start']->format('c');
            $change->Updates->SetItemField[] = $field;

            // Set the updated end time.
            $field = new SetItemFieldType();
            $field->FieldURI = new PathToUnindexedFieldType();
            $field->FieldURI->FieldURI = UnindexedFieldURIType::CALENDAR_END;
            $field->CalendarItem = new CalendarItemType();
            $field->CalendarItem->End = $update['end']->format('c');
            $change->Updates->SetItemField[] = $field;

            $field = new SetItemFieldType();
            $field->FieldURI = new PathToUnindexedFieldType();
            $field->FieldURI->FieldURI = UnindexedFieldURIType::CALENDAR_RESOURCES;
            $room = new AttendeeType();
            $room->Mailbox = new EmailAddressType();
            $room->Mailbox->EmailAddress = "myroomemailaddress";
            $room->Mailbox->Name = "Room 2";
            $room->Mailbox->RoutingType = RoutingType::SMTP;
            $field->CalendarItem->Resources->Attendee[] = $room;
            $change->Updates->SetItemField[] = $field;

            //update attendees
            $field = new SetItemFieldType();
            $field->FieldURI = new PathToUnindexedFieldType();
            $field->FieldURI->FieldURI = UnindexedFieldURIType::CALENDAR_REQUIRED_ATTENDEES;

            foreach ($update['attendees'] as $guest) {
                $attendee = new AttendeeType();
                $attendee->Mailbox = new EmailAddressType();
                $attendee->Mailbox->EmailAddress = $guest;
                $attendee->Mailbox->RoutingType = RoutingType::SMTP;
                $field->CalendarItem->RequiredAttendees->Attendee[] = $attendee;
            }
            $change->Updates->SetItemField[] = $field;

            $request->ItemChanges[] = $change;
        }

        $response = $client->UpdateItem($request);

        $response_events = array();
        $response_messages = $response->ResponseMessages->UpdateItemResponseMessage;
        foreach ($response_messages as $response_message) {
            // Make sure the request succeeded.
            if ($response_message->ResponseClass != ResponseClassType::SUCCESS) {
                $code = $response_message->ResponseCode;
                $message = $response_message->MessageText;
                dump("Failed to update event with \"$code: $message\"\n");
                return $message;
            }

            // Iterate over the updated events, printing the id of each.
            foreach ($response_message->Items->CalendarItem as $item) {
                array_push($response_events, array(
                    "Id" => $item->ItemId->Id,
                    "ChangeKey" => $item->ItemId->ChangeKey
                ));
            }
        }

        return $response_events;

How can I better understand what is missing in my request?

Thanks for your support