Share folder shows domain\username instead of username@domain.com

Hi Guys,

I have a doubt on folder share permissions....

when we right click on folder -> security -> here we can see the list of groups and users are having access...

in my environment suddenly it shows users as domain\username instead of username@domain.com... and after few minutes it back to normal as username@domain.com...

could anyone tell me what is the issue????

Note: there is no issues everything seems to be working normal... i just want to know the cause for this..
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Azarudeen MohamedSystem EngineerAsked:
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McKnifeCommented:
These SIDs are evaluated by the domain controllers. It depends on which DC is asked, I guess.
You could do a test: at the client, establish a temporary firewall rule that disallows all traffic to DC1. Then see what result you get and afterwards repeat the test after changing the rule to disallow all traffic to DC2.
(assuming you have exactly 2 DCs).
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QlemoBatchelor, Developer and EE Topic AdvisorCommented:
Those notations are equivalent, e.g. you can use both to log in. Though it looks strange that the display changes from "old" domain\user to "new" user@domain, it doesn't matter and is probably caused by receiving more details with a slight delay. The "traditional" way to display accounts is the old one.
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Azarudeen MohamedSystem EngineerAuthor Commented:
Thanks for the comment Qlemo
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Shaun VermaakTechnical Specialist/DeveloperCommented:
Ultimately those entries are stored as SIDs and only changed to UNC or UPN for the benefit of humans.

The display can differ between devices.
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Azarudeen MohamedSystem EngineerAuthor Commented:
Agreed but why it shows as UPN all the time suddenly changed to UNC for few minutes to  1 hour again changed to UPN... that's the question
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Azarudeen MohamedSystem EngineerAuthor Commented:
yes, we have 2 DCs... thanks for the clarification. i will try this.
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McKnifeCommented:
You don't need to select solutions before you even tried. Share your findings.
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Azarudeen MohamedSystem EngineerAuthor Commented:
I guess that, that's why i finalized that was the reason and selected as solution and I did a check the result is what you said.

Thanks all who commented here (Y)
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McKnifeCommented:
Still, we don't know, why.
Why would DCs give a different answers?
Are those DCs of the same OS?
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