@Jalle - Welcome to Microsoft Q&A and thanks for reaching out to us.
To remove yourself from the client's Azure directory, you need to ask the client to remove your account from their Azure Active Directory. Once your account is removed from their directory, you will no longer receive any notifications related to their Azure subscription.
If you are unable to contact the client or they are unable to remove your account from their directory, you can try the following steps:
- Go to the Azure portal and sign in with your account.
- Click on your name in the top right corner and select "Switch directory".
- Select "Create a new directory" and follow the prompts to create a new directory.
- Once the new directory is created, switch to it by clicking on your name in the top right corner and selecting "Switch directory" again.
- You can now remove your account from the client's directory by going to "Azure Active Directory" > "Users" and selecting your account. Click on "Delete" to remove your account from the directory.
Hope this helps. and please feel free to reach out if you have any further questions.
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