Upgrade the discovery mailboxes to R5 version, this will fix the RecipientDisplayType property of the discovery mailbox which was wrong in R4.

Hi All, It's been longtime I wrote any new article, being busy in some other stuffs.

I was doing installation of second Exchange Server 2010 Mailbox Role for my DAG (LAB) today and got this error. This error reminded me my Microsoft Exchange PSS days.  
I have seen this error before when exchange server 2010 was RTM.


I thought of writing a small article for this issue. To resolve this issue, first I uninstalled Mailbox Server Role and restarted the server. Ran Setup.com /preparead and tried the installation but it failed again.
Their is one attribute in exchange for all the mailboxes, its homeMDB. I checked the attribute on the user account by going into Adsiedit.msc...Domain Partition...User...Gulab Prasad (my account) and found that it is set on the account. 


Now there are two System Mailboxes from which this information is missing. Here is the attribute with homeMDB not set.



Now here is what I did to fix the issue. Go to Adsiedit.msc and Domain Partition and copy the attribute value from any user mailbox and paste it in homeMDB attribute.



After making the above changes, start the installation and installation will complete successfully. And, end result will look like this....


I hope it helps to someone, who's running into the same kind of issue.

Cheers,

6 Responses to Upgrade the discovery mailboxes to R5 version, this will fix the RecipientDisplayType property of the discovery mailbox which was wrong in R4.

  1. njew john says:

    Thanks alot. This post really helped me after 3 days of sleepless nights. i missed the 3 green

  2. Gulab says:

    You are welcome. I am glade I could help.

  3. Tobias says:

    Works perfectly. Thanks!

  4. Gulab says:

    Good to hear, that I could help!

  5. Hi, Same issue, but none of my user accounts have HomeMDB set... Can't install the first mailbox role. ??

  6. Gulab says:

    Did you tried deleting the Discovery Mailbox and ran the setup again? I assume you are doing upgrade from SP1 to SP2 or SP3? Or it's a fresh installation?

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