We are unable to open shared mailboxes in OWA from the internet but it works fine inside our network.

Which version of Exchange? What happens when you try it? Any error messages?Outlook Web Access For PDA , OWA For WAP www.owa-pda.com email a@t leederbyshire d.0.t c.0.m

What is the error?Oliver Moazzezi | Exchange MVP, MCSA:M, MCITP:Exchange 2010, BA (Hons) Anim | http://www.exchange2010.com | http://www.cobweb.com | http://twitter.com/OliverMoazzezi

Exchange 2007. This is the error we are receiving. Server Error <fieldset> 404 - File or directory not found. The resource you are looking for might have been removed, had its name changed, or is temporarily unavailable. </fieldset>

Exchange 2007. This is the error we are receiving. Server Error <fieldset> 404 - File or directory not found. The resource you are looking for might have been removed, had its name changed, or is temporarily unavailable. </fieldset> Any redirects set for OWA?

Can you check that you can still open your own mailbox externally? There may be an issue with the server name you are using externally (it will probably be different to what you use internally), and host header names configured on your default web site. But this would not affect only shared mailboxes.Outlook Web Access For PDA , OWA For WAP www.owa-pda.com email a@t leederbyshire d.0.t c.0.m

Reverse proxy redirects it from port 80 to 443.

1. Which Exchange version are you using? 2. Is this an issue with all users? 3. Can you reproduce the issue? 4. Has this ever worked? Sukh

Exchange 2007 Yes. Everyone is having the problem. Yes. I had 1 person tell that it worked for them in the past but I never saw it myself.

This is the error I am receiving Server Error <fieldset> 404 - File or directory not found. The resource you are looking for might have been removed, had its name changed, or is temporarily unavailable. </fieldset>

1. What error if any are you getting? 2. Pick one user, and try both methods in the link. (URL and OWA). http://technet.microsoft.com/en-us/library/aa998830(EXCHG.80).aspx Sukh

I have already tried this and still no luck.

1. Can you confirm that OWA is actually working (externally)? Sukh

1. You say it works for one person, Is this still the case? 2. Pick a problem User. Verify the mailbox this User is trying to access has full mailbox permission on that mailbox. 3.Check the same as point 2 with the working user in point 1 if it still works? Sukh

It is no longer working for that 1 person.

1. Have you checked the permisison as stated above? 2. If you setup a similar scenario with a completly new user and a new shared mailbox, does this work?

Yes. I have full admin permission to all mailboxes and I receive the same error.

Hi, You have to create a security group, add relevant users to that group and then grant full mailbox access to that group (you might also need to grant Send As permission if that's a requirement). When they access shared or group mailbox via Internet they would need to indicate alias in the URL (e.g. https://owa.company.com/Exchange/aliasofthesharedmailbox) Resource: Shared mailboxes in OWA 2007 Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Yes. It is working.

Thank you. I tried creating a security group, adding relevant users to that group and then granting full mailbox access to that group and I am still receiving the below message. <fieldset> 404 - File or directory not found. The resource you are looking for might have been removed, had its name changed, or is temporarily unavailable. </fieldset>

1. Seems like an issue with IIS. Check your IIS config and redirects. 2. Run the ExBPA against this server. Sukh