We have bamboo 5.3 and it is using Crowd (which is synched with our AD) for user management. We have a user who is in crowd and shows up in bamboo users and his assigned groups. The problem is, when he tries to login to bamboo with his correct user and password, he keeps getting told his user is invalid and is getting prompted for a username/password and a captcha. We have never seen this behavior from bamboo for a user who is in the system - for all other users, their AD user and pw work fine. We have investigated this from the AD/Crowd side and have determined that there is nothing wrong with his user account. Also, he can login into JIRA just fine, and it is set up the same way with Crowd. Can you tell me what in bamboo may be causing this behavior? For instance, if there was a local user with same account name, could that cause a problem (just and example, we do not have local users and groups turned on for bamboo).