How to determine Exchange information for remote email access

We have SBS2011 with exchange that was set-up by another person.  We now have a need for our users to have access to their emails remotely using phones and ipads.  My questions are:

1. Will users by default have remote access using phones, ipads, etc
2. If not, steps to give them access
3. If or when they have access, where do I go to verify the server information to be entered within the email settings.  For example: mail.domainname

I have tried: theusername@thedomainname then within the Server field entered mail.domainname and it did not work.

I should mention that we have SpamSoap filtering our emails.  Two domains hosted within the server.  Users are only assigned or given a username on one domain.
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Lots of work...
 - make sure activesync is turned on for phone/tablet access (or pop or imap for just email on older phones)

 - Do you have access to view/change DNS settings for your domain?  This is where there should be a (A) host record that has the public IP to your exchange server

 - Is the firewall set to forward the requests to your exchange server (port 443 for ssl, port 80 for no ssl)

Then if "mail" is the (A)host record for your exchange server, then the server entered into the phone would be "".

Do you have SSL certificates installed?  if so they should be set for your exchange server and an autodiscover (that could help users connect their devices.

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MrGDAuthor Commented:
I have full admin rights so will check this out tomorrow.  I know the firewall was already set-up because there is a user on the other domain who was already set-up.  Will update what I find.
for users to be able to have access to your exchange box exchange active sync mus be enable this has been improved more in Exchange Server 2013.Its not a lot of work can be done in a few steps and tested to see that it works just fine.Active sync for exchange also can be set for different users as a security mechanism i would imagine you wouldn't like all the users to be able to connect to your server from out side what ever the case for remote access via mobile you will need active sync.
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MrGDAuthor Commented:
OK.  Got it working, but had to use remote.domainname instead of mail.domainname.  Is this something that is configurable during set-up or is there a difference?  Again, I did not personally set this up originally.  Thanks for the quick responses.
add a host record in your DNS for mail to point to the same IP address as remote...UNLESS you have SSL setup and the certificate is specifically for remote.domainname.

Otherwise if the cert is a SAN cert, you could add mail to it after adding to DNS

you could also setup autodiscover to help set up, but that will also require a DNS entry and SSL cert.

some people feel using unexpected names for servers and other configuration adds to the security of your servers
MrGDAuthor Commented:
Kwoof received split points for both comments.  Kutesir had a good suggestion on security by disabling activesync.  Thanks to all.
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