How can I change a user's login to use their e-mail instead of user ID?

[Brent Cox]

We have two LDAP imports from different AD environments, and I have discovered that there are overlapping user IDs between these two. This is causing accounts to completely disappear. Since we cannot manage both of these AD environments the same way, I thought the best solution, if possible, is to simply have the e-mail as the login instead of user ID. When I tested simply changing my user ID to my e-mail in DEV, I couldn't log in. What needs to be done to switch this login method to use the e-mail instead of user ID? Thanks! 

[felladin]

Hello,

There is a way to change your ServiceNow instance to have email as primary user identifier.

The problem I'm having right now is I cant remember how, and all replies and docs only talk about changing it for specific login procedures.

If you get a good reply, I hope I'll see it as well.