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Exchange 365 Contacts Routing

I am trying to create a way for external mail to be sent to an address in our company that would be distributed among several internal user mailboxes using a Contact in Exchange 365.  Situation: there is a Contact jane@mydomain.com who is also a user in AD. I just want this contact to point to a list of other domain users so that all mail sent to it from outside of the company goes to them. Right now the Contact just points to itself and all internal mail gets bounced back to sender - #550 5.1.1 RESOLVER.ADR.RecipNotFound; not found ##., mail sent from external sources just disappears.  I'm missing something basic here just not sure what it is.  

Is a DL a better choice for this? Do I need to delete the contact and AD user and just create a new distribution group?
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David AtkinTechnical Director
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Top Expert 2015

Commented:
Hi,

Yes I would use a Distribution Group for this.  Assign the Address to the DG and then add in the external contact and other Addresses as members.
Saif ShaikhServer engineer
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Commented:

Are you in a hybrid configuration?


OR you only have local Active Directory and Office 365 mailboxes.



Author

Commented:
Hi David.

When I try to create a DL of jane@mydomain.com get this error:
error
The proxy address "SMTP:jane@mydomain.com" is already being used by the proxy addresses or LegacyExchangeDN of "jane". Please choose another proxy address.( The "MailUser" with display name "jane" is already setup and using the same address.)

Is this because the Contact still exists? Do I need to delete it first? I was under the understanding that a Contact was required for outside mail to connect to us and a DL was just for internal use.

Author

Commented:
Hi Saif,

I guess we have a hybrid config as there are local Exchange servers still in use at different locations but the majority of accounts have migrated to the cloud using Office 365. I have been working on this problem through the Office 365 Admin Center .
David AtkinTechnical Director
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Top Expert 2015

Commented:
Hi,

Yes you'll have to remove or modify the item which currently has that Jane@ Address as you can't have duplicate email addresses. Once you've removed that from whatever has it, give 365 an hour to update and then attempt to add the Distribution Group.

Dave

I tested the solution from David Atkin on another account and it did work as he suggested. My own solution was to create a rule in Exchange Mail Flow so that all mail sent to the jane@mydomain is forwarded to the list of recipients. So far people seem happy with this solution. If they have any further complaints I'll delete the contact as David mentioned and create a DG. Thanks for all helpful suggestions.