AdmPwd error 0x80070032 could be due to missing Write permission on ms-MCS-AdmPwdExpirationTime and ms-MCS-AdmPwd attributes of all computer accounts to the SELF built-in account.
To make sure computer accounts can update the password and expiration timestamp of their own built-in Administrator password, we need to add the Write permission on ms-MCS-AdmPwdExpirationTime and ms-MCS-AdmPwd attributes of all computer account to the SELF built-in account. And we can use the following PowerShell to do this:
Set-AdmPwdComputerSelfPermission –Identity ManagedWorkstations –Verbose
Below threads discusses the same issue and you can try out some troubleshooting steps from this and see if that helps you to sort the Issue.
Event ID 7 “Could not write the changed password to AD. Error 0x80070032 https://social.technet.microsoft.com/Forums/Lync/en-US/87e06e3f-3678-47f3-a4de-adfc5d34924e/event-id-7-8220could-not-write-changed-password-to-ad-error-0x80070032?forum=winserver8gen
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