cannot modify exchange distribution group as it thinks a member is missing?

Hello, We have an All staff distribution group in Exchange 2010, today I tried to add a new member giving them the ability to send from this distribution group to all staff. Upon adding the user and applying the change I get the following error:

Couldn't find object "local.domain.co.uk/USERS/Joe Blogs. Please make sure it was spelled correctly or specify a different object.

Now, the Joe Blogs account above is not the user I was trying to add but a user that used to be a member of the ALL staff distribution group but has since left the organisation and is not listed as a member of the distribution group. Whilst the Joe Bloggs account is still in AD it has been disabled and the associated mailbox deleted from exchange.

So I thought that since the error is regarding the actual user object I presumed it didn't like the fact that the account was disabled. I have since re-enabled the account but the error still exists. So it would appear that the user object in Exchange is actually referring to the associated mailbox as this no longer exists.

Any quick fixes here? Some how I need to remove the association of the Joe Bloggs account with this distribution group but strangely the Joe blogs account is not listed as being a member of the distribution group.

Thanks
Anne_WardAsked:
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Abdul Khadja AlaoudineCommented:
Check the 'Message Delivery Restrictions' for that Distribution group. Is that disabled user present in the list under 'Only sender in the following list'?
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Anne_WardAuthor Commented:
I was able to look at the distribution list in AD under recipients and modify the group membership there and remove the Joe Bloggs account causing the issue.
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Anne_WardAuthor Commented:
Worked it out for myself
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