which is best public folders or shared / user mailbox

im setting up a repository for shared emails for a new project we will be working on
this will simply be a location to dump all emails relating to the project
company users will need access to them as well as an external company
we will also need access to this location from mobile devices
im going to create an accepted domain on our exchange server for the other company and create AD accounts for them
this will allow me to add an additional exchange account onto their existing computers
my question is should i use public folders to hold this email or shared / user mailbox
both will allow me to store the emails and both will allow me to set permissions on each folder
using a 3rd party app like public fodler sync will allow me to sync either a public folder or shared mailbox to a mobile device
so im not sure which i should be using
im thinking i should go with shared/user mailbox as each new exchange version there seems to be talk of public folders being done away with
what should i use public folder or shared mailbox?
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dougdogAsked:
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R--RCommented:
In your scenario the best is to use the shared mailbox.
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dougdogAuthor Commented:
why is that
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Alexei KuznetsovMicrosoft Outlook MVPCommented:
I personally always prefer Public Folders because in opposite to Shared Mailbox they maintain Unread message state per-user. And I hate Shared Mailboxes for the lack of this simple functionality.
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dougdogAuthor Commented:
have you anyway of getting access on android and ios
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Alexei KuznetsovMicrosoft Outlook MVPCommented:
Sure. Through OWA.
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dougdogAuthor Commented:
owa on mobile devices use the light version
which from what i can see does not allow public folder access
im using exchange 2010 on prem
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Alexei KuznetsovMicrosoft Outlook MVPCommented:
It depends. I personally use the full OWA from my smartphone with Exchange 2010 =) And there is no such a problem in Exchange 2013 - you can easily add any Public Folder to Favorites there.
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dougdogAuthor Commented:
i logged in on my iphone  and cant see public folders
how do i view them
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Alexei KuznetsovMicrosoft Outlook MVPCommented:
Not sure about iPhone, but WinPhone (Lumia) works flawless.
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dougdogAuthor Commented:
yeah thats because its a windows phone
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Alexei KuznetsovMicrosoft Outlook MVPCommented:
Did you try Chrome for iPhone?
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dougdogAuthor Commented:
yes doesnt work in chrome either
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David Johnson, CD, MVPOwnerCommented:
public folders for all but iPhone users shared mailbox if iPhone users are involved
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dougdogAuthor Commented:
why is that
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David Johnson, CD, MVPOwnerCommented:
iPhones/iPads do not support public folders
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