Active Directory computer object parameter changed

hello experts
it has been perplex me for a long time, our company wireless network is using domain computer object authentication to connect, it is pushed by GPO.
sometimes a computer can't connect company wireless because authentication failed, tried reset computer account in ADUC but it doesn't help, i have to quit computer from domain then rejoin to fix it, so i think the computer subject must have something changed on client side or AD side which doesn't match anymore, but except wireless connection issue this computer works well under AD environment.
so you could you help investigate what is the culprit for my case?

thank you
beardog1113Asked:
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Shaun VermaakTechnical Specialist IVCommented:
The first thing I would check for is a time skew. Check all DCs and these computers to see it their date and time matches within 5 min difference
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beardog1113Author Commented:
hi Shaun
by follow your suggestion i got one computer fixed without rejoin domain, let me try on more machines then accept your comment as the best solution.
thanks
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beardog1113Author Commented:
hi Shaun
today i found a laptop has the same issue, but system time was accurate, then i got the laptop have cable connected, change system time larger than 5 min difference then change it back to accurate point, and reboot then company wireless could connected, that is very funny and strange.
any ideas?

thank you
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beardog1113Author Commented:
so this issue must related with system time right?

thanks
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Shaun VermaakTechnical Specialist IVCommented:
today i found a laptop has the same issue, but system time was accurate, then i got the laptop have cable connected, change system time larger than 5 min difference then change it back to accurate point, and reboot then company wireless could connected, that is very funny and strange.
any ideas?
Faulty CMOS battery, incorrect NTP configuration etc.

so this issue must related with system time right?
I am 100% sure it is
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beardog1113Author Commented:
hi Shaun
any idea why mentioned laptop system was accurate at the beginning but can't being authenticated?

thank you
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Shaun VermaakTechnical Specialist IVCommented:
Accurate as in the same as the DC?
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beardog1113Author Commented:
yes it is, this i can sure
thanks
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beardog1113Author Commented:
hi Shaun
appreciate your advice that really helpful, the last question of mine really strange few people facing it before i guess, so i get this case close, definitely this issue related with system time, also i found the most easy way to fix it without reboot the laptop, just change system time 10 min different with accurate then change it back, refresh WIFI connection and it could connected right now.

thank you
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