Scp is tested with all versions from RTM to every single CU (including CU12).

You can check the SMTP addresses added to the account in ECP or AD objects which should be pretty much the same created via ECP or SolidCP..

Thanks for prompt reply. below is my SolidCP version

• SolidCP Server Version:
  1.4.2
• SolidCP Server Filepath:
  C:SolidCPServer asp.net v4.5

cu12 i tried fresh install twice, and cu11 fresh install twice. now i am trying cu10

i did issue command for get-mailbox xxx |fl , and use notepad++ to compare both, it doesn't make a lot of different. is that front end hub transport need any parameter to lookup certain parameter ?

SMTP address is correct without typo.

Do you use any specific Exchange setup? (as 2016 and above is pretty much all in 1 not compared to the diff roles of previous versions), Deployments we normally use is a 2x Exchange with DAG and 1x witness (non- AD DC's)

Infront of that you can have filters/ etc to your preference ofcourse.

My deployment is single exchange without DAG

i do have vlsc iso on cu12. after failed to receive email i tried to download from below url

https://www.microsoft.com/en-us/download/details.aspx?id=57827

https://www.microsoft.com/en-us/download/details.aspx?id=57388

Well, if ECP addition works but SCP doesn't the easiest way is to check Active Directory Atributes and compare.

In general i am really not aware of anything other then SMTP Address that is required for this, but as your having mixed results it might be worth holding a working and a broken one side by side and check the difference.

Alternatively i would also try telnet to send mail (first locally, then within the network, then from outside) to see the differences on returns.