give external non company users access to public folders only

im going to create a public folder for to store emails
this folder will be used for a project that both my company and an external company will access
how can i give access for the external users and be sure that they have no other access to our systems
should i create an ad account and a mailbox so that the external users can log into owa
should i create a new accepted domain and add non company users
would it be possible to add the public folder to external company users outlook
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dougdogAsked:
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Simon Butler (Sembee)ConsultantCommented:
To access public folders will require a mail enabled account.

You can then just limit that account/s on what they can login to and use transport rules to stop them from emailing out with the account.

You can add the account to a remote Outlook if Outlook 2010 or higher, using Outlook Anywhere.

Simon.,
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dougdogAuthor Commented:
is this just by using the exchange server name and user account and password
when the external user opens outlook they will be prompted for username and password every time ?
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Simon Butler (Sembee)ConsultantCommented:
It would be the Outlook Anywhere address and would require Autodiscover working correctly.
A username and password prompt would be generated because they need to authenticate against your domain.

There is no real solution to this unfortunately. You could have the email in a shared mailbox and then use OWA instead - still requires an account to authenticate against.

Simon.
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dougdogAuthor Commented:
can i stop the external users i put on our exchange server from seeing our internal GAL
and stop them from receiving company email sent out to all users
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Simon Butler (Sembee)ConsultantCommented:
Transport rules will stop them from getting email, just create a rule to block all email.
However GAL is a lot more complex. You haven't said which version of Exchange you are using. If Exchange 2007 or older then not really.
If Exchange 2010 or higher then an address book policy will do the job for you.

Simon.
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dougdogAuthor Commented:
yes exchange 2010
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