With Exchange 2000 the only way you could be getting presented with a "who are you" list when you access the SA is if you've used GrantUnityAccess to associate AD accounts with local accounts on the Unity box. With Exchange 55 this it's also possible to do this by simply binding the same NT account to multiple Exchange accounts.
The GrantUnityAccess tool stuffs the SID of the account you pass to it into the SidHistory table we maintain locally. This SID is associated with a local subscriber account on the Unity server (i.e. Example Administor or Installer). When you attempt to access the SA we first lookup the token of the user that hit the web page and see if they're a subscriber. We then check their SID in the SidHistory table and see if there's an entry. If there's more than one match here, we present a list... which is likely what you're seeing.
This is done such that sites can have a single domain account that has SA access to multiple machines (i.e. central administration of multiple Unity servers) among other reasons. You shouldn't normally have a local subscriber account ALSO have an entry in the SidHistory table so the list presentation thing should not be the norm.
Unfortunately there's no easy way to go into the SidHistory table and pull out the row(s) you don't want to be in there since all you can see is a binary security descriptor and the ObjectID (GUID looking string) associating that with a local subscriber account. I'll look into making a graphical version of GrantUnityAccess that shows the alias/display names of the accounts and which local subscriber account they're associated with... it will let you add/edit/remove these associations as well. I'm heading out of town here, though, so I wont be able to look at it till next week sometime.
Jeff Lindborg
Unity Technical Lead/Answer Monkey
Cisco Systems
lindborg@cisco.com
http://www.AnswerMonkey.net (new page for Unity support tools and scripts)
