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exchange mult tenancy username method

Posted on 2014-11-28
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Last Modified: 2014-12-01
im setting up a new external company email through multi tenancy
this domain will have users from my main primary company and also the new  external domain as they both will work on a project
what is  the best way to have my own users setup on the new domain
I need to keep in as simple as possible
I wont be able to create their new accounts using firstname.secondname as they will already have their primary accounts configured and it wont allow me to use the same sam name
what is the easiest method to set this up for my main primary domain users to access their own email box and the new tenant im setting up
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Question by:dougdog
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Expert Comment

by:VB ITS
ID: 40470267
Add a UPN suffix for the new external domain in your AD forest, then create the new accounts using this new UPN suffix. See here for steps on how to add a UPN suffix to your environment: http://support.microsoft.com/kb/243629

As for their pre-Windows 2000 username you can just add a prefix for the new domain to the front of their username to separate it from their existing main account if you need to use the same username.

e.g. if a user already has john.doe as their current username, you can just assign the new account the pre-Windows 2000 username of nc-john.doe (nc being short for New Company - you can change this to whatever you want) so it doesn't conflict with the existing john.doe account.

End result will be john.doe@newdomain.com for their user logon name and domain\nc-john.doe for their pre-Windows 2000 username.
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by:VB ITS
ID: 40470274
Here's some screenshots of how I would manage logins for separate companies in a multi-tenancy setup using UPN suffixes.
Current-Account.pngNew-Account.png
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Author Comment

by:dougdog
ID: 40470333
how do you manage passwords
its a hassle with 2 accounts passwords expiring etc
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by:VB ITS
ID: 40470338
Comes with the territory when you have multiple accounts. There are, of course, third party tools out there which can probably help your users manage their passwords but I can't personally recommend any as I don't use them.
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Author Comment

by:dougdog
ID: 40470348
ok just 1 last thing I was wondering I created an srv dns record for autodiscover @ the new domain name
however when I log in as the new tenant users I get hit with a security certificate
the first 2 have green ticks but the
last check says the name on the security certificate is invalid or does not match the name of the site which is obvious as the domain name is different
is there any way around this
if I click yes it works but don't want users to have to click yes every time they login
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VB ITS earned 500 total points
ID: 40471550
How exactly did you configure the SRV record? i.e. what's the value of this record?

Have a look at this article to set up AutoDiscover in a multi tenant environment using a SRV record: http://social.technet.microsoft.com/wiki/contents/articles/5787.exchange-2010-multi-tenant-autodiscover-and-dns-configuration.aspx
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Author Closing Comment

by:dougdog
ID: 40473637
fantastic advice thank you very much
helped me out greatly

thanks again
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Expert Comment

by:VB ITS
ID: 40473648
Not a problem, glad I could help!
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