After hours of searching for a bug, it works - User accounts in sandbox mode, currently they are not persistent between restarts (ie restarting opensim.exe) but should be persistent between sessions (login/ logout).

Use the -account command line arg to enable them and then create new accounts through the web interface 

1 files changed, 1 insertions, 0 deletions

diff --git a/OpenSim.Framework/IUserServer.cs b/OpenSim.Framework/IUserServer.cs
index bb2b668..21f2721 100644
--- a/OpenSim.Framework/IUserServer.cs
+++ b/OpenSim.Framework/IUserServer.cs
@@ -10,5 +10,6 @@ namespace OpenSim.Framework.Interfaces
     {

         AgentInventory RequestAgentsInventory(LLUUID agentID);

         void SetServerInfo(string ServerUrl, string SendKey, string RecvKey);

+        bool UpdateAgentsInventory(LLUUID agentID, AgentInventory inventory);

     }

 }