Workgroup server authenticate external AD account
Hello. For security and infrastructure reasons, I got a server which has to stay in a "workgroup" domain, not integrated in an active directory. Meanwhile, I have a list of 15 users of my Active Directory who have to log on this server through TSE/RDP Cals. Is there any way for a server not in my AD to authenticate "external" (from another AD) users and to open a session on the server ? Thank you.