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EX2003; Share Common mailbox and multiple AD accounts which are not mailbox-enabled.

Hi All,
I have problems sharing a common mailbox (MSExc2003sp2) with multiple AD accounts (AD2003sp1) which are not mailbox-enabled.

common mailbox  "reception HQ" - receptionHQ@mydomain.local > ( mydomain\userX)
I would like give FULL Mailbox access to multiple Active Directory accounts without create any additional mailbox for them, just use only one, "Reception HQ"; authentication: using own AD account.
Additional users with full mailbox access: (domain\userY) (domain\userZ) (domain\userK) ...

a- PF email enabled cannot be used for this purpose.
b- avoid personal mailboxes for (domain\userY) (domain\userZ) (domain\userK).
c- Outlook on (domain\userY) (domain\userZ) (domain\userK) computer's have to be set with 1 profile pointing to the common mailbox only.

I have already tried set for the AD accounts (that have not any mailbox) Full Mailbox access and "Send as" rights on "Reception HQ" but i receive permission error, the common mailbox cannot be open from (domain\userY) (domain\userZ) (domain\userK) computer's

Have you any idea? is this possible in Ex2003 as was in EX5.5?  suggestions?
Thanks in advance !!
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1 Solution
If you set up an outlook profile for the recep account on each machine, they should be prompted for a username and password for that account when they open outlook.
Stacy SpearPresident/Principal ConsultantCommented:
They need the Read permissions on Exchange Advance as well. After that, go to advanced permissions and ensure that the accounts don't have any deny rights specified or in a group that has deny.
ITDataCenterAuthor Commented:
Thanks for your prompt reply!
I added the on maibox:
"reception HQ" - receptionHQ@mydomain.local > ( mydomain\userX)

 > Mailbox rights <
# deleted mailbox storage
# full mailbox access
# read access (added)

> Security <
# receive as (added)
# send as (added)
and all other by default

on UserZ 's pc i created a new Outlook 2003 profile, poimnting to "reception HQ" mailbox.
at the user name & password request i used "mydomain\userZ"
Outlook opens the mailbox successfully but when i try so send a message i got the following error:

 -- you do not have the permission to send the message on behalf of the specified user --

also if use the field "FROM": Reception HQ    i have the same error message.

of couse, i cannot add the user on the "send on behalf of" mailbox option, the userZ do not have any mailbox and i do not want to create for this purpose.

Any idea? what are the proper permissions to set?(security & mailbox rights items)

Thanks a lot!

ITDataCenterAuthor Commented:

i have found the proper permissions to apply by user, with "write access" now i can send email without problems.
Do you see any problems using those settings?

 > Mailbox rights <

# deleted mailbox storage
# full mailbox access
# read access (previoulsy added)
# write access (ADDED) <<<<<<<<<<<<<<<<<
Stacy SpearPresident/Principal ConsultantCommented:
No I don't, a "trick" to get it to work is to add the common mailbox to the sendas permission. I know it sounds stupid as the common can send as itself already, but it does work.
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