Why am I being asked to verify this (possibly former) Microsoft employee?

exmsft.com provides email services for ex-Microsoft employees.

If someone requests an account but is unable to send from their @microsoft.com email address we ask that they provide one or more references from existing Microsoft employees. If you’ve received such a confirmation request from the exmsft.com administrator (currently Leo Notenboom), that’s all that’s going on.

We simply need informal confirmation that the person requesting the exmsft.com account did, once upon a time, work at Microsoft.

Thanks for your help,

Leo A. Notenboom
http://exmsft.com caretaker
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https://askleo.com/about
http://leonotenboom.com