--- a/net/minecraft/server/players/OldUsersConverter.java
+++ b/net/minecraft/server/players/OldUsersConverter.java
@@ -20,6 +_,9 @@
 import java.util.UUID;
 import javax.annotation.Nullable;
 import net.minecraft.core.UUIDUtil;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.nbt.NbtAccounter;
+import net.minecraft.nbt.NbtIo;
 import net.minecraft.server.MinecraftServer;
 import net.minecraft.server.dedicated.DedicatedServer;
 import net.minecraft.util.StringUtil;
@@ -49,7 +_,8 @@
 
     private static void lookupPlayers(MinecraftServer server, Collection<String> names, ProfileLookupCallback callback) {
         String[] strings = names.stream().filter(name -> !StringUtil.isNullOrEmpty(name)).toArray(String[]::new);
-        if (server.usesAuthentication()) {
+        if (server.usesAuthentication() ||
+            (io.papermc.paper.configuration.GlobalConfiguration.get().proxies.isProxyOnlineMode())) { // Spigot: bungee = online mode, for now.  // Paper - Add setting for proxy online mode status
             server.getProfileRepository().findProfilesByNames(strings, callback);
         } else {
             for (String string : strings) {
@@ -65,7 +_,7 @@
                 try {
                     userBanList.load();
                 } catch (IOException var6) {
-                    LOGGER.warn("Could not load existing file {}", userBanList.getFile().getName(), var6);
+                    LOGGER.warn("Could not load existing file {}", userBanList.getFile().getName()); // CraftBukkit - don't print stacktrace
                 }
             }
 
@@ -120,7 +_,7 @@
                 try {
                     ipBanList.load();
                 } catch (IOException var11) {
-                    LOGGER.warn("Could not load existing file {}", ipBanList.getFile().getName(), var11);
+                    LOGGER.warn("Could not load existing file {}", ipBanList.getFile().getName()); // CraftBukkit - don't print stacktrace
                 }
             }
 
@@ -156,7 +_,7 @@
                 try {
                     serverOpList.load();
                 } catch (IOException var6) {
-                    LOGGER.warn("Could not load existing file {}", serverOpList.getFile().getName(), var6);
+                    LOGGER.warn("Could not load existing file {}", serverOpList.getFile().getName()); // CraftBukkit - don't print stacktrace
                 }
             }
 
@@ -200,7 +_,7 @@
                 try {
                     userWhiteList.load();
                 } catch (IOException var6) {
-                    LOGGER.warn("Could not load existing file {}", userWhiteList.getFile().getName(), var6);
+                    LOGGER.warn("Could not load existing file {}", userWhiteList.getFile().getName()); // CraftBukkit - don't print stacktrace
                 }
             }
 
@@ -313,6 +_,37 @@
                     private void movePlayerFile(File file3, String oldFileName, String newFileName) {
                         File file4 = new File(worldPlayersDirectory, oldFileName + ".dat");
                         File file5 = new File(file3, newFileName + ".dat");
+                        // CraftBukkit start - Use old file name to seed lastKnownName
+                        CompoundTag root = null;
+
+                        try {
+                            root = NbtIo.readCompressed(new java.io.FileInputStream(file4), NbtAccounter.unlimitedHeap());
+                        } catch (Exception exception) {
+                            // Paper start
+                            io.papermc.paper.util.StacktraceDeobfuscator.INSTANCE.deobfuscateThrowable(exception);
+                            exception.printStackTrace();
+                            com.destroystokyo.paper.exception.ServerInternalException.reportInternalException(exception);
+                            // Paper end
+                        }
+
+                        if (root != null) {
+                            if (!root.contains("bukkit")) {
+                                root.put("bukkit", new CompoundTag());
+                            }
+                            CompoundTag data = root.getCompound("bukkit");
+                            data.putString("lastKnownName", oldFileName);
+
+                            try {
+                                NbtIo.writeCompressed(root, new java.io.FileOutputStream(file1));
+                            } catch (Exception exception) {
+                                // Paper start
+                                io.papermc.paper.util.StacktraceDeobfuscator.INSTANCE.deobfuscateThrowable(exception);
+                                exception.printStackTrace();
+                                com.destroystokyo.paper.exception.ServerInternalException.reportInternalException(exception);
+                                // Paper end
+                            }
+                       }
+                        // CraftBukkit end
                         OldUsersConverter.ensureDirectoryExists(file3);
                         if (!file4.renameTo(file5)) {
                             throw new OldUsersConverter.ConversionError("Could not convert file for " + oldFileName);