I received an email from this email address: Mıcrosoft οutlook - firstname.lastname@example.org.
The email said: Outlook Support
A request to deactivate your Mailbox (email@example.com) ownership on (fbaengr.com) was made and this request will be processed shortly.
Note: This will stop you from receiving incoming emails, to continue using your mailbox please Click Here for confimation to avoid mail deactivation.
Mail sent to: firstname.lastname@example.org
(C) 2017 οutlook Team. All rights reserved. NMLSR ID 399801
... however I am not trying to deactivate my account - is this even an email from your office?