Friday , 10 April 2020
Home 4 Exchange server 4 Introduction to Exchange 2007 Server Roles

Introduction to Exchange 2007 Server Roles

Exchange 2007 introduces a new concept to Exchange organizations, the concept of server roles. Similar to how a Windows server can host one or more roles, this type of configuration has been implemented in Exchange Server 2007.

Introduction

Server roles allow an administrator to split the functions of an Exchange server and place each role, or a combination of roles, on different servers in the organization. This can be done for performance reasons, management reasons, or any other reason deemed necessary by the organization’s policies.


With current Exchange servers you can make a server a Front-End server or a Back-End server and that is about it. Exchange 2007 introduces five roles to the Exchange organization.
Edge Transport
Hub Transport
Client Access
Mailbox
Unified Messaging

The following graphic (Figure 1) shows the placement of each role in a typical organization.

Figure 1: Exchange 2007 Roles

Edge Transport Role

The Edge Transport role is installed on the edge of the network and therefore is installed on a standalone server that is not a member of the Active Directory domain. Because the server is not a member of the Active Directory domain, Active Directory Application Mode (ADAM) is used to sync AD with the Edge Transport server. ADAM and a component called EdgeSync are used to perform scheduled one-way synchronization of the configuration and recipient information from Active Directory. This allows the Edge Transport to perform recipient lookups and Spam filtering.

The Edge Transport role performs a number of functions including Anti-spam and Anti-virus protection. The Edge Transport uses connection filtering, content filtering, recipient filtering, SenderID, sender and IP reputation to reduce the amount of Spam delivered to the end users inbox. Mail tagged as Spam will sit in a Spam quarantine from which administrators can delete or allow messages tagged as Spam. One of the top features is the ability for Outlook 2003 and 2007 clients to merge their Spam settings (like white and black lists) to the Edge Transport server to increase the efficiency and accuracy of the filters. The built in VSAPI has been improved and the introduction of transport agents will allow third party AV applications to provide stronger AV filtering.

Edge Transport Rules are used to protect the Exchange organization by applying rules and, based on whether the message passes or fails, appropriate action is taken. Unlike the Anti-virus and Anti-Spam processing, Edge Transport rules are based on SMTP and MIME addresses, words in the subject or message body, and SCL rating. The Edge Transport role also handles address rewriting; in Exchange 2007 an administrator can modify the SMTP address on in or outbound mail.

The Edge Transport server is also responsible for all mail entering or leaving the Exchange organization. Mail travels inbound through the Edge Transport and once the Edge Transport Rules have been applied the message is passed on to the Hub Transport server. Because the Edge Transport is responsible for all in and outbound mail, you can configure multiple Edge Transport servers for redundancy and load balancing.

Hub Transport Role

The Hub Transport role is responsible for all internal mail flow. This role is similar to the bridgehead server in an Exchange 2000/2003 organization. In fact it originally was called the Bridgehead Role until it was changed.

The Hub Transport server, as well as the rest of the server roles, is installed on member server(s) in an Active Directory domain. There is no need for ADAM on this, or any other role aside from the Edge Transport. Because it is a member of an AD domain, all its configuration information is stored in AD and any other Hub Transport servers you install will get their configuration from AD.

Inbound mail is accepted from the Edge Transport and passed on to the user’s mailbox and all outbound mail is relayed from the Hub Transport to the Edge Transport and out to the Internet. The Hub Transport and Edge Transport servers are very similar and in fact, one can forgo the Edge Transport server and configure the Hub Transport to accept mail from, and send mail to, the Internet. Hub Transport agents can also be deployed to enforce corporate message policies such as message retention, something that will come as good news to administrators attempting to comply with SarbOx rules.

The Anti-Spam and Anti-virus features of the Edge Transport can be configured on the Hub Transport in order to reduce the number of servers required. It is quite feasible that you may only have one server in your Exchange organization with all the roles installed on it. In this case you cannot have an Edge Transport and all those features will be passed on to the Hub Transport role.

Mailbox Role

The simplest of the roles has to be the Mailbox Role. Quite simply the Mailbox role holds the Exchange databases within which the user mailboxes are contained. It is also home to the Public Folder databases if you enabled Public Folders. (They are not enabled by default in Exchange 2007)

Client Access Role

The Client Access Role is similar to the role a Front-End server would play in an Exchange 2000/2003 organization. The Client Access server is the server that users connect to with their mail client, mobile device, or web browser. The Client Access server handles all connections whether they come from an application such as Outlook 2003 or 2007, Outlook Express, or any other MAPI, POP3 or IMAP4 client. The Client Access server also handles connections made from mobile devices such as a Windows Mobile 5 Smartphone, or any other device using Exchange ActiveSync. Exchange ActiveSync in Exchange 2007 supports all devices with PocketPC 2002/2003 and Windows Mobile 5. Figure 2 shows how all the clients and roles connect to each other.

Figure 2: Exchange 2007 Client Access

This role also provides Outlook Web Access (OWA). OWA allows a user to access his or her mailbox from a web browser and have full access to all the information in the mailbox including task lists, calendar information, mail items and public folders. One of the hot new functions of OWA is Sharepoint and UNC access. Now users can access UNC shares (\\servername\share) and Sharepoint document libraries reducing the need for complex VPN configurations.

The last, and in my opinion, coolest role is the Unified Messaging Role. The Unified Messaging role is responsible for merging your VOIP infrastructure with your Exchange organization. What does this allow for?
combined voice, fax, and mail in one inbox
access to voice, fax and mail via multiple interfaces

Need to check your voicemail but all you have is Internet access? No problem, connect to the Exchange server with OWA and you will find your voicemail as attachments in email messages. Running late for a meeting and no access to email or your calendar? Call the Exchange server and move the start of the appointment in your calendar and the attendees with get an email notifying them of the change.

Unified messaging will change the way user’s access voice, fax and email and they will love you for it. Now before you get too excited this will require some special hardware to interact with your phone system and more information will be released as Exchange 2007 gets closer to RTM.

Check Also

The Best Advice About I’ve Ever Written

Why You Should Consider Using Mobile Robots In Your Business Workplace Job loss is a common worry that is associated with the use of robots and any form of automation. However, that is far from the truth, and the use of mobile robots is associated can actually help your company in a big way. Companies …

Short Course on – Getting to Square 1

The Tech Jobs That You Should Know about in America The tech industry is considered …

52 comments

  1. I’ve been doing a search online for this particular info and I personally have only found puzzling as well as inadequately composed articles until now. This specific is the greatest as well as easiest to understand write-up on this particular subject matter I have found.

  2. Your content is certainly not short of impressive. It’s been quite a long time since I read a piece of writing so well-written and straightforward. Carry on the extraordinary job. Thanks a lot.

  3. Nice writing capabilities are difficult to come across nowadays. It’s apparent you’re a skillful and also talented writer. Your own points are well received by me personally. Thanks for creating this.

  4. This post is more than fascinating. You actually have compiled this in such a unique fashion that I just read it as well as remained fascinated. I personally agree with the points in your content.

  5. Thanks for composing as well as sharing this post. You’re obviously rather educated in this area and I also have discovered this specific to be intriguing and smart reading. Remarkable job.

  6. I aspire I possibly could create material that excelled similar to this! You are really on the ball along with your research and also writing in this subject matter. It is great quality material.

  7. There are several good points here with which I personally agree. I’ll have thought about some of them, nevertheless that’s actually why I love this post.

  8. I like this info you’ve created right here. It’s insightful and interesting. I will return for more as soon as I could. Many thanks.

  9. This is a quite interesting and excellent quality write-up. You actually truly caught my attention on various points. I accept you for the most part whilst considering a few of these ideas. Many thanks for caring regarding your writing.

  10. I’m not sure how you made it happen, nonetheless you’ve hit the nail on the head in this posting. I agree fully on most of the specifics you have given in this content. Thanks a lot.

  11. This is really awesome reading. It’s full of practical information which is easily understood as well as remarkably readable. I relish reading high quality content articles this well-written. Thanks.

  12. This is a rather interesting and good quality post. You actually genuinely got my personal interest on quite a few points. I personally accept you for the most part while considering a few of these ideas. Thank you for caring regarding your compiling.

  13. Really good writing capabilities require more than just education. It is passion that sets the fine and excellent authors apart. I actually see you have got interest as well as expertise.

  14. This post is a lot more than interesting. You have composed this in such a special way that I read it and also remained fascinated. I personally agree with the points in your content.

  15. Genuinely impressive compiling! A lot more writers need to care just as much as you do about the content they come up with. It has truly provided me a good reason to think a lot more on this particular subject matter. Thank you for this.

  16. This is some of the best material I’ve read in a long time. You have genuinely struck on a few strong points in my opinion. I personally accept you. Do not give up rolling out fabulous content material like this.

  17. You have highlighted some extraordinary points in your article. I find this particular pretty thought-provoking and interesting content. I actually desire you plan to share further information on this specific subject so I can learn more. Many thanks.

  18. I enjoy looking through content articles that are so noticeably well researched. I feel this specific is actually valid content with a lot of glorious points. You are right on with this info. This specific is really terrific job. I personally loved this.

  19. I’m not a writer, however I love to read and I really know what I actually like. Additionally I understand nice writing whenever I see it which is very good.

  20. It’s so pleasant to find excellent content material such as this nowadays. This specific post isn’t only educational, but also interesting and educational. Quite terrific work.

  21. I am enjoying going through your own perspective in this article. I actually appreciate how well formatted it is and just how evident your own content has been composed. You’ve done a great work of making yourself heard.

  22. This is really exciting content! I have completely liked going through your points and have arrived at the conclusion that you’re right pertaining to a lot of them. You actually are excellent.

  23. This post is a lot more than interesting. You actually have created this in such a special way that I read it and also remained fascinated. I personally agree with the points in your material.

  24. My own viewpoint is that this write-up is tremendous. I go along with most of the information you have presented and I am interested in going through extra articles compiled by you. Good quality job!

  25. It isn’t really regular that I get to love a post as much as I did yours. This specific is actually glorious article writing with very well-laid out content which is readable.

  26. Thought-provoking content is few in number from what I’ve been reading recently. You have got a true diamond here. It has genuinely created plenty of thought inside me plus I appreciate it.

  27. Incredible original content. Thanks for making this subject fascinating as well as clear. The arrangement of the points you’ve made is awesome. I actually stand in awe of your own true writing abilities.

  28. Wonderful work at having your points right here. I am in agreement with you on most and I think this is a quality article.

  29. It is a perfectly created article. You should have executed lots of exploration in this field. You actually have made this particular matter readable, intriguing and easy to understand.

  30. I had to read this impressive write-up a second time to make certain I grasped your own points. I agree with many of them as well as intend to return for lots more.

  31. Incredibly informative write-up. You actually really got my personal interest with the way you intelligently showcased your points. I actually agree with most of your material and I am examining a few aspects of interest.

  32. I see a lot of articles with badly written content that this posting is exciting. It’s wonderful to learn you can find individuals who can get their point across the way you have.

  33. I compliment this writer regarding compiling this type of special and also good quality info having opinions I can comprehend. I personally could not quit reading this article. I got so immersed in this particular content. Thanks a lot!

  34. I love a remarkably decent write-up just like it. You ponder a lot like I actually do and I am glad I found your current article. Thanks so very much.

  35. I am satisfied I found this post. Your information is thought provoking as well as really fascinating. I accept the points you’ve made here in this particular writing.

  36. Many times I need to figure out what the writer is attempting to say in their content articles. There is no question with regards to your write-up. It’s nice!

  37. I could ask lots of queries regarding this information, however you have laid every little thing out on the table here to the point it is simple to catch. I personally accept much of your post.

  38. Thank you very much for discussing your knowledge on this topic. I accept a great deal of your own content. It is very fine info.

  39. Really informative article. You truly got my interest with the method you skillfully highlighted your own points. I personally accept much of your content material and I’m examining a few aspects of interest.

  40. I am not very confident where to begin with this particular, so I will simply state it is an extremely good write-up. I’ve loved reading it and also pondering the numerous points you make.

  41. I wish you continue to compile since I discuss your own opinions and I would love to read far more of your own content. This is actually sensational information.

  42. So far, I personally agree with you on much of the info you’ve created here. I will have to ponder some on this, nevertheless by and large this is a really good write-up.

  43. I’m surprised about how interesting this article is, particularly on this particular topic. You have hit the ball out of the ballpark with this particular. Thanks for making this content so easy to read and comprehend.

  44. This is simply the top write-up on this particular subject matter I’ve seen up to now. I’m glad I had the chance to go through it. You have done well.

  45. There’s nothing superior to a tremendous brain-stimulating article. This is just exactly what you’ve right here. I’m able to hear my own gears creaking. I agree with this specific content. This specific is an extremely well-written top quality write-up. Thank you very much.

  46. You’ve got a real talent for putting your thoughts into clear, unique material. The post is easy to read and comprehend. You’ve brought forth several decent points which I agree with and also value.

  47. You’ve made awesome points in this post and you’ve presented them in a wonderful format that is simple to read and also comprehend. This is actually brain stimulating and thought provoking content. This sort of writing is unique.

  48. I wish you keep write as I discuss your own opinions and I would love to go through a lot more of your content. This specific is actually fantastic info.

  49. Many thanks for sharing your own broad information on this subject. You have clarified several things up for me personally and offered me cause to be able to meditate on several of these perspectives. I personally really like going through high quality material such as this.

  50. Excellent article! I simply had to spend some time to say thanks to you for writing a write-up having such marvelous information. You tend to make correct points and I must agree with you on many of them.

  51. You have done an outstanding job on this specific write-up. It’s pretty readable as well as extremely wise. You’ve actually managed to help it become easy to understand and easy to read. You actually possess some real writing skill. Thanks.

  52. This post is evidence to me that you’ll find still good quality writers that do their investigation before they compose their content. Many thanks for creating such informative content. Great post.

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.

%d bloggers like this: