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khaled
New Member
November 12, 2025
Solved

Help Needed: Re-registering MDM After Already Signed Up Error

  • November 12, 2025
  • 1 reply
  • 0 views

Hello Android Enterprise Community,

I’m trying to set up my MDM, but I keep encountering the following error:

"Someone at testmdm.xyz has already signed up."

I have previously attempted to remove the Android Enterprise enrollment from my domain, unlinked the MDM, and followed all standard steps. However, I am unable to re-register the MDM, and my attempts to enroll devices fail.

I would greatly appreciate guidance on:

How to fully clear any previous Android Enterprise enrollment associated with my domain
Steps to re-register an MDM successfully
Any best practices or troubleshooting tips to avoid this issue in the future

Thank you in advance for your help. Any advice from experienced admins or Google support is highly welcome.

@jasonbayton

Best regards,

Khaled

Best answer by jasonbayton

Sorry for the late response @khaled , the notification system here is very unhelpful and I miss pings constantly. 

 

The issue you're facing - from the looks of things - stems from the Google account you're using to bind Android Enterprise with the managed Google domain. You need a Super Admin account on the Workspace side, otherwise you run into issues like this.

 

Is there any chance you recall what the super admin account was from the earlier setup? If so, that should sort you. If not.. it'll probably need escalation.

1 reply

J
jasonbaytonAnswer
Level: 4.1: Jelly bean
November 13, 2025

Sorry for the late response @khaled , the notification system here is very unhelpful and I miss pings constantly. 

 

The issue you're facing - from the looks of things - stems from the Google account you're using to bind Android Enterprise with the managed Google domain. You need a Super Admin account on the Workspace side, otherwise you run into issues like this.

 

Is there any chance you recall what the super admin account was from the earlier setup? If so, that should sort you. If not.. it'll probably need escalation.

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