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contoso.com Federated Domain
contoso.net Managed Domain
we would like shared workstations to not login automatically in IE.. So of course we removed adfs.contoso.COM from intranet zone (and all zones for that matter)
Shared workstations are logged in with a mix of UPNs represented by these two examples (These are DirSynced to 365 but are not licensed):
1. Â foo1@contoso.com
2. Â foo2@contoso.net
The Intranet zone contains *.contoso.net
When shared workstation was logged in as foo2@contoso.net we would get the error in the screenshot (below)
So I changed the UPN suffix to foo2@contoso.com (replicated and dirsynced). Â
Out of 10 workstations 7 worked - users received WIA login prompt. Â The symptoms of the 3 that failed were:
1. Â User joe@contoso.com walks up to shared workstation and launches from IE, https://portal.office.com
2. Â He enters joe@contoso.com in username field and is automatically redirected to adfs.contoso.com
3. Â User receives no auth prompt and instead is now logged in to foo2@contoso.com's portal
Notes:
- contoso.com Federated Domain
- contoso.net Managed Domain
- contoso.net is AD Domain name
- when I originally federated, I used supportmultipledomain switch even though there is only one top level federated domain (as more will be federated one day)
- Thinking supportmultipledomain was a possible issue, I did this last night but it failed:
Convert-MsolDomainToStandard -DomainName contoso.com -SkipUserConversion:$true -PasswordFile afile.txt
Convert-MsolDomainToFederated -DomainName contoso.com
and got this error:Convert-MsolDomainToFedera

Any assistance would be greatly appreciated.
Thank you.
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You may have to restrict users to only using In-private mode so that IE doesn't use existing cookies. Â At the very least, have joe@contoso.com launch IE using In-private mode and see if he can log in correctly.
GPOs prevent that unfortunately. Â And that would be a bit unmanageable - thousands of workstations.
I cleared the cookies and tried again and still the same issue anyway.
I also ran klist purge.
I am confused why *.contoso.net in the intranet zone AND the shared workstation login foo@contoso.net would clash.. I thought to prevent autologin was simply to remove adfs.contoso.com (the url for ADFS) from intranet zone.
This has me baffled.






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I have observed the issue with logging on to the portal with different usernames but still connecting as the one user (all while logged on to the workstation as a single user). Â Unfortunately I can't say what would be all the possible causes. Â A different browser or In-private mode have been my workarounds in that case.
When you say "shared workstations", what do  you mean exactly?  Just the workstations are shared (multiple people using the machine under their own login), or are the logins shared as well (multiple using the same machine, all logged on to the machine as the same account)?
Shared Workstations are one login and it stays logged in... multiple users walk up and use OWA
When using Site to Zone Assignments
contoso.com   is the exact same as   *.contoso.com
both are considered wildcards for contoso.com

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