If you can't change your Salesforce System Administrator using the steps in Add or change Salesforce system administrators, here are your options:
If you can't access your previous Administrator's User Record and there aren't any other Administrators on your account, Salesforce Customer Support can change your previous Administrator's email address for you.
To make the change (and preserve the security and integrity of the data in your account), we require that the letter be submitted as a request from a C-Level executive officer (for example, your CEO, CIO, CFO, or Business Owner), including their handwritten signature.
For fastest processing, scan and email letter to the Salesforce Customer Support representative handling your case. If you do not have a case open with Salesforce Customer Support, create a case with the Feature Activations & Limits Team .
You can also fax the letter to +1 415-592-3583 with attention to Technical Support and inform the support representative you've sent the fax.
Once the letter has been received, we will escalate your case for further review.
If approved, we will make the requested change and notify (via email from the case) the person requesting and the C-level executive authorizing the change.
We will then change the email address as requested allowing the user to reset the password (using forgot password) and log into the account.
Note: Once this process has been completed, it is recommended as a best practice to ensure to have more then one System Administrator at any given time so that disruptions in service are avoided.
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