Not sure if that is a good practice to be followed.
AEM This forum post mentions that this account is used for connection between WCM and CRX. Not sure if disabling, will have other repercussions.
May be we can await responses from SME's on the same.
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The admin account is a requirement of the AEM platform. As a consequence, admin account cannot be deleted. Even if we accidentally delete this account, it will be re-created upon repository restart (in the default setup).
This is clearly mentioned at:
So what you can do is, you can simply limit access to the admin account by changing the password and ensure only the administrators of the system have the new value.
To change the admin user password, please refer:
We hope this helps!
Duplicate question:- Disable admin user
//No, You cannot delete admin user.
Clarified in Docs User Administration and Security
User ID Type Description Recommendation
Default password: admin
System administration account and member of the administrator group, with full access rights.
This account is used for the connection between AEM WCM and CRX.
If you accidentally delete this account, it will be re-created upon repository restart (in the default setup).
The admin account is a requirement of the AEM platform. As a consequence, this account cannot be deleted.
Adobe strongly recommends that the password for this user account be changed from the default.
Preferably upon installation, though it can be done afterwards.
Note: This account is not to be confused with the admin account of the CQ Servlet Engine.