How to sign a Dynamics AX model file

To sign a model file you need an SNK file. If you don't have one just generate a key pair with the following command:

C:\Program Files\Microsoft SDKs\Windows\v7.0A\Bin\sn.exe -k YOURKEYFILE.snk
/(in older Versions it also could be in v6.0A) 

After that the snk file can be used to sign the model that is exported from an AOS. Make sure to set the client config to the right AOS and than just use the following command:

AxUtil export /model:NAMEOFTHEMODEL /file:MODEL.axmodel /key: YOURKEYFILE.snk