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I have an Mailbox which multiple users have access to, it works fine for me and I can add it in Outlook as an additional mailbox to my account and list all its content.

I can access my personal mailbox using IMAP, I'm testing it by just telneting in and LIST'ing it.

The problem is that another user trying to access it is having problems accessing it through IMAP; and I want to test if I can access the shared mailbox with my account - how can I do that in terms of IMAP commands?

What I am doing now is:

telnet mail.server
01 LOGIN user pass
02 LIST "" *

Edit: If there is another way to test this, that is an equally good answer.

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Be aware that using the Telnet utility is not the same as using telnet, which is a protocol. – John Gardeniers Jul 20 '10 at 7:54
up vote 2 down vote accepted
telnet mail.server 143

143 is standard port number for IMAP service. Then read this KB

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Yes, that should be it. I am getting the error: Account currently disabled (no matter if I'm using the correct user name or not). Do I need to specifically enable IMAP on the mailbox? – gauteh Jul 20 '10 at 8:12
Sorry, but I don't know Exchange server configuration. – lg. Jul 20 '10 at 8:39

For those not wanting to spending the time to read through the KB referenced by LG, the trick is in how you log in. Use:

? LOGIN domain/username/mailboxname password

Where mailboxname is the name of the shared mailbox you want to access.

Tested with Exchange 2003.

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