Catch all box for users who don't exist - Exchange 2013

We recently merged and as a part of this, migrated an old Exchange 2010 box and an Mdaemon box on to Exchange 2013.

Rather than bringing across all the old mailboxes, we only brought across the currently active ones.

However, some old mailboxes may still receive email and there may be aliases that weren't brought across.

Is there any way of capturing any mail that can't be delivered to a recipient and dumping it into a generic mailbox (i.e unknown@domain.co.uk)?
cbapartnershipAsked:
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DeepinInfrastructure Engineer Commented:
Link below will help you create a catchall mailbox

if you only 5/10 email addresses you can also create an 'unknown' mailbox or distribution group and add the additional emails addresses as aliases - another option

https://technet.microsoft.com/en-us/library/bb691132(v=exchg.141).aspx
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cbapartnershipAuthor Commented:
Hi

I've implemented it and it seems to be working at the moment.

Thanks for your help.
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