Multiple users cannot connect to the same mailbox in Outlook

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optdoug

Here is my problem.

I have a windows 2003 domain with a single Exchange 2003 server. I have a single username that all of the students in my lab login to. All can login to the domain fine. The problem is that when they all open Outlook to connect to the mailbox, only a few can connect at the same time. All the others just get " Disconnected" in the lower right hand corner of the Outlook window.

Is there a limit as to how many users can connect to the same mailbox at the same time? If so, how can I change this?

Thanks in advance,

Doug
 
O

optdoug

That sounds like it might work, but how many MAPI connections does one Outlook client require?

Doug
 
K

Khoj Sahiwala

32 sessions are the max allowed on exchange 2003.

If you select your mailbox in ESM and click logon tab and add/remoev columns , you will find that after 32 sessions it gets locked.

You can reset the sessions and after resetting you will find that clients are able to connect. It will also throw an event 9646
 
S

Sembee [MVP]

That sounds like it might work, but how many MAPI connections does one Outlook client require?

Doug
Can be as high as eight or more. There is no fixed number.

Simon.

Simon Butler, Exchange MVP
Blog | Exchange Resources
 
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