Hi
For Exchange I found a solution thanks to amtranik.
But has someone an idea for Domino ??
Thanx MarBerry
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Solution for BES Exchange:
1. HKEY_LOCAL_MACHINE\Software\Research In Motion\BlackBerry Enterprise Server\Agents.
2.Verify that the value of the AllowAddresslookup DWORD value is set to 0 or create ths DWORD
3.On the computer on which the BlackBerry Enterprise Server is installed, in the Services window, restart the BlackBerry Controller service.