Hi @Chong
Thank you for asking this question on the **Microsoft Q&A Platform. **
As the account and it's password is auto generated when setup AADC server, can I reset the account password?
Yes, you can, but you must configure your Azure AD Connect with the new credentials
Can I remove 2 of them and all 3 servers use the same account?
In theory, yes you can.
But do any of this may add more complexity to the management to Azure AD Connect,
I have been working with more than 3 AADC and I did have any issues that require changing the credentials or removing the service users.
Hope this helps,
Carlos Solís Salazar
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