Distribution Email for All Users Doesn't Reach All Users

There is an email that is sent to all employees in the company where I work. However, it has not been created as a distribution group. I can't locate it in Active Directory and I can't expand on it on the Receipient's line in Outlook. It looks like its just one regular user's email account.

While everybody in the company is supposed to receive the emails that are sent to this particular email address, there's one particular individual who never receives them.

What could be causing this? What are the first things that need to be looked at to find why this is not working 100%?
VicBelAsked:
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Simon Butler (Sembee)Connect With a Mentor ConsultantCommented:
It could be a personal address list in the sender's personal contacts list.
How does it appear in the email? It could also be a dummy To: address, with the real recipients hidden in the BCC line.

Simon.
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VicBelAuthor Commented:
Let's say that the email is sent to AllVicBel@company.org but I am unable to expand and see to whom the email is sent as it is not an actual distribution list. it's not an AD user, and not a group.

The sender in this case is upper management --they're the only ones with permissions.
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Simon Butler (Sembee)ConsultantCommented:
If you cannot see the group in AD, then it doesn't exist as an AD group.
Not withstanding permissions on the group, you should still be able to see it in AD.

Have you queried the domain to see what the address belongs to?

Simon.
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VicBelAuthor Commented:
I have queried the domain but I couldn't find the address/user.
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Simon Butler (Sembee)ConsultantCommented:
If you have checked the domain then it must be something that the sender has on their own system, which is outside of the scope of the AD.

Simon.
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VicBelAuthor Commented:
The sender may not be just one person; senders are members of executive management or HR, Could this be something that was created within the scope of Exchange only?
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Simon Butler (Sembee)ConsultantCommented:
Exchange doesn't maintain its own groups - it has no directory. If a group is created in Exchange then it is stored in the domain.

You need to get on to the machine of one of those users and look at the group they are using. The fact that it is multiple users may not mean anything - if they are all using the same shared contact source with a personal distribution list (for example) that would be outside of Exchange/Domain but multiple users would be affected.

Simon.
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