A customer is looking at federating their Gateway with another part of their business that uses OCS (going to Lync). Both parts of the business you the same internet domain for their email addresses. This means that me (firstname.lastname@example.org) who uses Notes and Sametime has the same email domain as a colleague to be Jeff Clarke (email@example.com) who uses Outlook and OCS (soon to be Lync).
Is this possible? I have read a snippet somewhere from a non-IBM blog saying that they can't be the same SIP domain which would put a stop to this but has anyone had any real world experience of this and whether there are any network workarounds that could be used?