gatewayProxy attribute contains old data

We are transitioning from Microsoft Exchange 2003 to Exchange 2007.  Exchange has been
installed successfully.  After running a scan using the Best Practices Analyzer Tool, I received
a warning that “Recipient Update Service did not process all changes.  The ‘gatewayProxy’
attribute for Recipient Update Service (Enterprise Configuration)’ contains old data that was not
fully processed.  This data has existed since 2006-08-02T20:43:23Z and should be manually
removed to avoid accidental changes to user addresses”.   I receive the same warning for the
‘domain configuration’.  This article addresses what I believe to be the solution
http://technet.microsoft.com/en-us/library/aa998435(EXCHG.80).aspx  However, I would like to
verify this is correct.  If so, what kind of “accidental changes” could result from not doing this?  
I have followed the steps outlined in this article up to the point of deleting old attributes, but have
not deleted them.  There are two attributes and appear as a long string of numbers/letters
followed by SMTP and X400 values.  I want to be sure this is a proper course of action since I
don’t have a full understanding of what deleting these attributes will or could affect.
BW_TechAsked:
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michael_b_smithConnect With a Mentor Commented:
Clearing the gatewayProxy won't affect those at all.

As part of your migration, the Exchange 2007 server will have one or more Email Address Policies that will override and replace the Recipient Policies (which is where the gatewayPolicy is used) on the Exchange 2003 server.
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michael_b_smithConnect With a Mentor Commented:
This is non-destructive to clear. Go ahead and follow the instructions.

It is possible that (usually only one) Exchange object did not properly get stamped with the proper Exchange attributes. That could be a little challenging to locate. But if no one has complained, it probably isn't an issue.
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BW_TechAuthor Commented:
Thanks for your response. No one has complained, but let me expand on the scope of the project.  We currently have an Exchange 2003 server that handles internal mail only.  External mail is being handled through a hosted POP account.  With this transition, we plan to consolidate and simplify.  Smartphones are becoming popular and a driving force of the project.  So, I need to be sure that this change won't affect features (primarily Internet Mail and ActiveSync for Exchange) that we will be using, but are not currently.
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