The bConnected - Manage My Key (MMK) feature was discontinued on November 5, 2020.
Please see instructions for how to configure third-party email clients using OAuth/without the use of a key: How do I configure my third-party email client to use bMail without Google Apps Login Key?
If you have an application or program that is unable to OAuth or use CalNet Authentication, please submit a ticket to the bConnected team: bconnected@berkeley.edu