In Microsoft Dynamics Nav 2013 and higher, Microsoft announced powershell cmdlets and its very easy to get all Nav users using powershell command Get-NAVServerUser
Any idea how to get all users in Nav 2009 and lower where this is not supported? I need a way to get this users programmatically using powershell or c#.
Sorry, its not possible. However you can do it in SQL if its not a proprietary database
There is no direct equivalent to the powershell commands before NAV2013.
In NAV 2009 you can use Web Services to expose information, which you can then consume via a C# (or most other languages that support wsdl), this requires configuration changes and possibly the creation of a pages or codeunits to show the information.
There are some samples at Freddy's blog here
Web services can be back-ported to at least 5.0 and possibly further back.
Another approach is use the C/ODBC driver to connect to NAV which you should be able to implement with some kind of wrapper in C#, the documentation is included on the installation media with each version.
A third approach would be to write a query directly to the database, you could also use views and stored procedures here.
