Authentication: same account name but different domain

[Simona]

I have two users directories set in my environmente that are connected to two different Active Directories, that are trusted.
So we have users in two different domain : @domainA and @domainB
The question is: it is possible to have two users whith the same SAMAaccountname but different domain (i.e. persico@domainA and persico@domainB)? Or is it a problem? Can I force users to insert also their domain when they want to authenticate themselves?
Thank you!
Simona

[George Baier IV]

I'm having this same issue. Two LDAP directories in Confluence and two users (one in each) with the same AD name. It's merging their names and account info into one profile.