i think i found the solution

in the sys.database_principals vue

thanks again.

Cdt.

thanks so much for the explain

what i dont understand is how to generate the SID.

you talked about the NEWID fonction..?

i create the sqlserver login

thanks for your help

thanks for your reply...

what do you mean the SID ..? security ID..? the certificat when you create your mirroring..?

that means when you create the login you have to mappe the...