We are currently on 5.6.2 soon we will release 5.6.4. Can you try latest version? It may not solve it but we are working on several versions after 5.5.4
I downgraded from 5.6.2 to 5.5.4 because that’s the version it started happening on.
I am not sure what other details i can give you, there is nothing in logs, and I cant access Management to enable Detailed logs because it crashes as soon as I try to press → button to login.
Delete the tables from dbo.LicenseAddons then run licensing.exe again on the server. Then start sambapos see if that helps. Licensing is handled by the registry. Did anything change in the hardware? Or is anything clearing the registry?