Can't Create Organization
Right i have made some progress. Under AD setting possibly as I am using windows 2022 I have has to use the firstname.lastname@example.org which has now then work. Not sure why but has sorted my issue and got exchange working also fine now.
My issue still exist until now, and i have no idea for the solution
For setup of the AD inside SolidCP we recommend to install SolidCP Server with a AD account which has Domain Admin rights.
Under Server configuration you just list the domain like in the attached image.