In Active Directory what roles do the user objects 'ExchSvc' & 'Master Contact List' play?

We're performing a cleanup of AD and tightening up security on user objects. I've come across the objects 'ExchSvc' & 'Master Contact List' and haven't been able to identify anything with regard to the roles they serve or what permissions they require.

Can someone define what roles they serve? And if they require domain admin access rights?
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Will SzymkowskiSenior Solution ArchitectCommented:
These are not groups or users that were created when Exchange was created. So based on that you need to identify what there purpose is. Because these accounts were not system generated they would only be dependent on Exchange if you have set them up this way.


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joshlamerrittPrincipalAuthor Commented:
That's what I thought. I just can't find anything definitive on where they might have come from.
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