I have a FILESTREAM share on a SQL server in domain AAA and a users in domain AAA and BBB. The two domains have a full trust. Users in domain AAA can access the share from UNC \server\mssqlserver\dbshare\tableshare or through Explore FileTable in SSMS. Users in domain BBB can't access the share through the UNC or SSMS. However they can map a network drive to the share and access it that way. Both users have same login/user permssions on the instance/database. Why cant users in domain BBB access the share through the UNC path or SSMS?