Exchange 2010 EAS problems

Well after bashing my head against the wall for the last 2 hours or so I have found a solution to my issue.
In Exchange 2010 after migrating from Exchange 2007 (not sure about 2003 haven’t had the issue with a 03->10 migration yet) you may get the following error when trying to use ActiveSync : -

ActiveSync registered a problem on the server.
Support code: 0×85010014
The Exchange Connectivity Analyser will state that there is a HTTP 500 error
The solution to this is that any users that wish to use ActiveSync need to have inheritance turned on on their AD user object.

Now if setting this on one user is OK but to do it to a lot (I have about 2200 AD objects and they think it is around 90 ActiveSync user) use ADModify (www.codeplex.com/admodify)

After doing this all phones synced again, although they did do a complete re-sync so just bear that in mind