Right i have made some progress. Under AD setting possibly as I am using windows 2022 I have has to use the user@domain.local which has now then work.  Not sure why but has sorted my issue and got exchange working also fine now.

Craig

sorry @mastercodefu

My issue still exist until now, and i have no idea for the solution

Hello,

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.

Regards,

Trevor