Hello, I currently facing major problems on a large site in AD domain functional level 2003 (field and forest). Consists of a single domain controller in Windows 2003R2. All the Windows 7 Pro that I join to the domain ,are being ejected about few days with an error message when the user tries to login : "The trust relationship between this workstation and the primary domain failed" The only solution I found, which is not a ral one, is disjoined and then joined back the Windows 7 workstations , until the behaviour comes back !!! Help the hesitation may not last, and despite all attempts I've done No one changed anything. Thank you in advance for any ideas, my client is getting impatient Best Regards, Yann