If you have a large number of Linux systems using AD, this may not be efficient, but for a small number of systems, the simplest way of doing this is to run the following on the Linux machine:

getent passwed ADUSER >> /etc/passwd 

Then edit the corresponding line in /etc/passwd to reflect the preferred shell (or better yet, use sed to change the shell entry on the fly before appending to /etc/passwd). IDMU, as others have suggested, is probably the most elegant solution for multiple hosts, but the above example gets the job done if you're just looking to do this on a few systems.

If you have a large number of Linux systems using AD, this may not be efficient, but for a small number of systems, the simplest way of doing this is to run the following on the Linux machine:

getent passwd ADUSER >> /etc/passwd 

Then edit the corresponding line in /etc/passwd to reflect the preferred shell (or better yet, use sed to change the shell entry on the fly before appending to /etc/passwd). IDMU, as others have suggested, is probably the most elegant solution for multiple hosts, but the above example gets the job done if you're just looking to do this on a few systems.