Send on Behalf permission for User with no exchange account

[error404]

Hi Guys

 

here is a scenario

 

3 Students here on work experience at the College working in a staff department

 

We created new accounts for them called for example

 

studentWork1

studentWork2

studentWork3

 

they have same basic permissions like our staff accounts

 

the request was that these accounts will have an AD Login, No Exchange Mailbox but all have access to a shared mailbox when they launch outlook

 

This all works fine when the user logs in under the accounts we have set up the outlook profile so they can access this shared mailbox and they can read emails

 

Now the problem is when they want to reply to these emails the error comes up with "User does not have permission to send on behalf of"

 

Went into Exchange console running 2010 - and there when we try and setup mail flow > send on behalf of > when searching for these users they don't show up - i guess because they don't have an exchange account

 

My question

Would I have to create individual mailboxes for them and on the outlook set up their profile so they can only access the shared mailbox then give them permission to send on behalf of? or is there a way of doing it with the current setup

 

Hope i make sense

[MatthewL]

I haven't touched exchange for a while might be messy but worth a look at checking the security permissions of the mailbox you want to send on behalf of in exchange and try adding the users in there and giving them send on behalf rights, a long shot but might work.