Problem with reply all on hosted exchange

I have a customer who has some users on Android and Iphone devises on hosted Exchange with Telus in Canada.

The problem on some devices is when a user replies to all (Reply All) in an email it also includes the user itself. That is, when they select ‘Reply All’ they get thier own sent message back again in about 10 seconds.

Any ideas what to look for?
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GerhardpetAsked:
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Simon Butler (Sembee)ConsultantCommented:
Does the list of recipients include a group that the user is a member of?
That is the only reason I can think of, unless there is something about how you have setup the devices so it doesn't recognise the local recipient. That can be the case where there are multiple email addresses for the user, or they aren't using ActiveSync.

Simon.
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GerhardpetAuthor Commented:
No the recipients do not include a group. It is only on some of the phones not all of them. My customer has about 30 phones and they are a mix of BB, Android, and IPhones. I'm not the one who does the IT for them only web development but the was asked if I could look in to this.

After this posting I notice that their autodiscovery CName record is not setup correctly. It is setup as an MX record. Not sure if that would cause problems. I notify their IT manager of this so will see once he has made the change.
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Simon Butler (Sembee)ConsultantCommented:
I would doubt if that is the cause, because internal email delivery doesn't use the Autodiscover information. This maybe something that you have to take up with the host.

Simon.
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GerhardpetAuthor Commented:
Still haven't found a solution for this. Anyone else have some ideas for me?
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GerhardpetAuthor Commented:
Found the problem

The exchange host is configured to sync with the local AD server so now when they configure there phones it configures the email as email@domain.local

The Outlook client knows to use the primary email but not the phone. So when the user replies to all his/her email is included to the reply all recipients because it is not .local
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GerhardpetAuthor Commented:
Found solution myself
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