windows 2012 domain controller

I have a ESXI 6.0 host with vcenter and i created VMs Domain controller +Vcenter servers.

Today Vcenter server asked me administrator expired and Password change .after password changing ,all my VMs server administrator password automaticaly changed.

I thought ,after domain controller installed ,need not administrator password chaning till i do it manual.

Do i do something wrong with domain controller (windows 2012)? i loggen test.lan\administrator all my VMs.

Thanks
needs needsAsked:
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Sajid Shaik MSr. System AdminCommented:
did u applied any group policy , i .e any password policy changes ?
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needs needsAuthor Commented:
no ,there is no GPO rules , i just leave all DEFAULT. also GPO DEFAULT policy too. i was  wonder domain controller administrator password changing Message.
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needs needsAuthor Commented:
if i install and give domain controller role to a windows 2012 server. Should be administrator password changing not expire by default .Is it correct?
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Sajid Shaik MSr. System AdminCommented:
yes is whould be

default policy is not expire...

even check the default policy for password once on your domain is there any thing applied like password age, account lockout policy etc.

if nothing is configured check the security logs...

all the best
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needs needsAuthor Commented:
i just installed DC and leave all configuration default. nothing changed and appled.
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David Johnson, CD, MVPOwnerCommented:
Vcenter server asked me administrator expired and Password change .after password changing ,all my VMs server administrator password automatically changed. Vcenter password and VM passwords have absolutely nothing in common. So was it windows or was it vcenter that requested the password change?
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