Technical Exchange bLog

Some users were receiving error <#5.5.2 smtp;554 5.5.2 Invalid data in message> #SMTP# when they sent message with attachment. The problem is when attached document name is longer than 50 characters . Some Firewalls have header size restriction and that limit blocks this messages to be sent. To correct this, change header limit on affected Firewall or shorten the name of the document you are sending (which is probably not good permanent solution). ****** Update #1 : Default header size limit in Exchange 2007 is 64K . Update #2: It might be the SMTP version problem. Mail is rejected with CONTENT-DISPOSITION error (overly long message header field for CONTENT-DISPOSITION) but not for all SMTP servers (same mail sent through different SMTP servers). If you send mail with attachment that has name longer than 50 characters from Exchange 2007 directly through DNS you may encounter this error, but if you send same mail from Exchange 2007 through smart host (other than Exch...

There is a good article regarding Offline Address Book (OAB) on Microsoft's support site. From article's summary: Microsoft Office Outlook 2007 and Microsoft Office Outlook 2003 have many new features and enhancements that are related to the offline address book. By default, Outlook uses a cached mode configuration. Because cached mode generates an offline address book, understanding how to configure the offline address book so that it works efficiently in your Microsoft Exchange organization is important. Article can be found here .

Microsoft released new update rollup for Exchange Server 2007 on 5th of May. This update is cummulative update and includes Update rollup 1. Update can be downloaded from Microsoft Update (not Windows Update), which includes Exchange patches or downlload it from KB935490 . Check known issues section of KB article http://support.microsoft.com/?kbid=935490 before applying this update.

Microsoft documentation about transition to Exchange 2007 suggests that you should install HUB Transport and Client Access (CAS) roles first and than mailbox server role. Exchange 2007 installation order in transition should look like this: Client Access server role Hub Transport server role Mailbox server role Unified Messaging server role Exchange 2007 CAS role enables users to gain access to their mailboxes through web browser (OWA), ActiveSync or Outlook Anywhere (fromerly known as RPC over HTTPS). It is actually "replacement" for Exchange Front-End server known from previous versions. Microsoft suggests that you should replace Front-end servers with Exchange 2007 CAS (I think it would be best to say redirect users to new Exchange CAS. Redirection process can be done on FW or just as a change in DNS, but this depends on your network configuration) prior mailbox move from Exchange 2000/2003 to Exchange 2007 mailbox server. Since new Exchange 2007 OWA is using /owa( https:/...

Ports that need to be open on firewall for Edge Server subscription with Hub Server to function properly: For Inbound traffic: SMTP - TCP port 25 (from Internet) SMTP - TCP port 25 (from Edge server to Hub server on internal network) For Outbound traffic: SMTP - TCP/UDP port 25 (from Edge to Internet) SMTP - TCP/UDP port 25 (from Hub to Edge server) LDAP for EdgeSync - TCP port 50389 (from Hub to Edge server) Secure LDAP for EdgeSync - TCP port 50636 (from Hub to Edge server) Since Edge server needs to communicate with Hub server it is important that it can resolve Hub transport servers by FQDN and Hub transport servers must be able to resolve Edge servers by its FQDNs. To accomplish this you need to either open 53 (DNS) port and configure internal network adapter to use internal DNS but as a security precaution I would suggest to enter DNS records for Edge servers on local DNS manually and to fill hosts file on Edge servers with FQDNs for Hub transport servers.

In order to install Exchange 2007 Edge server role you need to install Active Directory Application Mode (ADAM) on your computer if you do not have Windows 2003 R2 installed. You can download ADAM from this link . ADAM is part of Windows 2003 R2 and you can find it in Control Panel --> Add/remove Windows Components You do not need to create an ADAM instance by yourself for Exchange 2007 Edge server. ADAM instance will be created after you create Edge Subscription on Hub server.