diff --git a/src/main/java/eu/siacs/conversations/generator/IqGenerator.java b/src/main/java/eu/siacs/conversations/generator/IqGenerator.java
index 6dcccaab..d0965821 100644
--- a/src/main/java/eu/siacs/conversations/generator/IqGenerator.java
+++ b/src/main/java/eu/siacs/conversations/generator/IqGenerator.java
@@ -1,5 +1,6 @@
 package eu.siacs.conversations.generator;
 
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
@@ -151,12 +152,21 @@ public class IqGenerator extends AbstractGenerator {
 	}
 
 	public IqPacket changeAffiliation(Conversation conference, Jid jid, String affiliation) {
+		List<Jid> jids = new ArrayList<>();
+		jids.add(jid);
+		return changeAffiliation(conference,jids,affiliation);
+	}
+
+	public IqPacket changeAffiliation(Conversation conference, List<Jid> jids, String affiliation) {
 		IqPacket packet = new IqPacket(IqPacket.TYPE.SET);
 		packet.setTo(conference.getJid().toBareJid());
 		packet.setFrom(conference.getAccount().getJid());
-		Element item = packet.query("http://jabber.org/protocol/muc#admin").addChild("item");
-		item.setAttribute("jid", jid.toString());
-		item.setAttribute("affiliation", affiliation);
+		Element query = packet.query("http://jabber.org/protocol/muc#admin");
+		for(Jid jid : jids) {
+			Element item = query.addChild("item");
+			item.setAttribute("jid", jid.toString());
+			item.setAttribute("affiliation", affiliation);
+		}
 		return packet;
 	}
 
diff --git a/src/main/java/eu/siacs/conversations/services/XmppConnectionService.java b/src/main/java/eu/siacs/conversations/services/XmppConnectionService.java
index e13a3e65..28a353b6 100644
--- a/src/main/java/eu/siacs/conversations/services/XmppConnectionService.java
+++ b/src/main/java/eu/siacs/conversations/services/XmppConnectionService.java
@@ -1547,11 +1547,9 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 	public void changeAffiliationInConference(final Conversation conference, Jid user, MucOptions.Affiliation affiliation, final OnAffiliationChanged callback) {
 		final Jid jid = user.toBareJid();
 		IqPacket request = this.mIqGenerator.changeAffiliation(conference, jid, affiliation.toString());
-		Log.d(Config.LOGTAG,request.toString());
 		sendIqPacket(conference.getAccount(), request, new OnIqPacketReceived() {
 			@Override
 			public void onIqPacketReceived(Account account, IqPacket packet) {
-				Log.d(Config.LOGTAG, packet.toString());
 				if (packet.getType() == IqPacket.TYPE.RESULT) {
 					callback.onAffiliationChangedSuccessful(jid);
 				} else {
@@ -1561,6 +1559,17 @@ public class XmppConnectionService extends Service implements OnPhoneContactsLoa
 		});
 	}
 
+	public void changeAffiliationsInConference(final Conversation conference, MucOptions.Affiliation before, MucOptions.Affiliation after) {
+		List<Jid> jids = new ArrayList<>();
+		for(MucOptions.User user : conference.getMucOptions().getUsers()) {
+			if (user.getAffiliation() == before) {
+				jids.add(user.getJid());
+			}
+		}
+		IqPacket request = this.mIqGenerator.changeAffiliation(conference, jids, after.toString());
+		sendIqPacket(conference.getAccount(), request, null);
+	}
+
 	public interface OnAffiliationChanged {
 		public void onAffiliationChangedSuccessful(Jid jid);
 		public void onAffiliationChangeFailed(Jid jid, int resId);
diff --git a/src/main/java/eu/siacs/conversations/ui/ConferenceDetailsActivity.java b/src/main/java/eu/siacs/conversations/ui/ConferenceDetailsActivity.java
index ce367240..9e38790a 100644
--- a/src/main/java/eu/siacs/conversations/ui/ConferenceDetailsActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/ConferenceDetailsActivity.java
@@ -117,10 +117,17 @@ public class ConferenceDetailsActivity extends XmppActivity implements OnConvers
 			builder.setPositiveButton(R.string.confirm,new DialogInterface.OnClickListener() {
 				@Override
 				public void onClick(DialogInterface dialog, int which) {
+					if (!mucOptions.membersOnly() && values[0]) {
+						xmppConnectionService.changeAffiliationsInConference(mConversation,
+								MucOptions.Affiliation.NONE,
+								MucOptions.Affiliation.MEMBER);
+					}
 					Bundle options = new Bundle();
 					options.putString("muc#roomconfig_membersonly", values[0] ? "1" : "0");
 					options.putString("muc#roomconfig_whois", values[1] ? "anyone" : "moderators");
-					xmppConnectionService.pushConferenceConfiguration(mConversation,options,ConferenceDetailsActivity.this);
+					xmppConnectionService.pushConferenceConfiguration(mConversation,
+							options,
+							ConferenceDetailsActivity.this);
 				}
 			});
 			builder.create().show();