Support Numbers of unknown email with @hotmail.co.uk address - maybe virus?

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http://androidforums.com – Hi all Just wondering if any of you happened to bump up to this issue. I just realized today that in my contacts there are so many unknown names with email address @hotmail.co.uk.. at a glance it looks like virus or something (please see the attached screenshot from my phone), because none of it is belongs to my friends in the contacts. When I click for details, it seems to be connected to Microsoft Exchange ActiveSync. The names come up with all possible alphabets: have 5 contacts with name beginning with "c" [email protected] [email protected] [email protected] cvfgv@ho (General)