Solved

Cross Forest Availability Exchange 2010

Posted on 2014-03-19
1
869 Views
Last Modified: 2014-05-14
Hi,

Here is my scenario:

We have a Domain Trust between 2 organisations who recently merged, let me call them A.local & B.local.

Both domains have exchange 2010, I've configured cross forest availability between them so calendar sharing is possible. I used FIM (Forefront Identity Manager) to sync users of domain A.local as cross forest contacts in B.local. Users from A.local can look up calendars of users from B.local and the other way around, everything just fine by now.

But now the two organisations want to share the same SMTP addresses over the 2 domains. I've configured this by changing the accepted domain as an internal relay domain, so mail for A.local arrives at exchange and delivers it to B.local if the mailbox doens't exist on A.local (through send connector). Mail flow is working fine in this situation.

The problem is the exchange availability (free/busy) between the two domains:

If a user of A.local with primary smtp address userA@ABC.COM want to lookup a calendar of a user in B.local with primary address userB@ABC.COM this doenst work. MX records of ABC.COM are pointing to A.LOCAL. It is working the other way around. An autodiscover record for domain ABC.COM is created an pointing to A.LOCAL.

If you need more info, shoot ¿

Any help appreciated!!
0
Comment
Question by:secuteamers
1 Comment
 
LVL 39

Accepted Solution

by:
Adam Brown earned 500 total points
ID: 39940603
Check your Organizational Relationships settings. If ABC.com is not listed as a domain with an organizational relationship, you won't be able to do Free/Busy lookups with other domains that use that domain as a Primary SMTP address. And I'm not 100% sure that even that will work. One way that *will* work would be to make sure that each forest has a different Primary SMTP address, rather than setting up both forests to use the same Primary SMTP domain.
0

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

In this article, I am going to show you how to simulate a multi-site Lab environment on a single Hyper-V host. I use this method successfully in my own lab to simulate three fully routed global AD Sites on a Windows 10 Hyper-V host.
Phishing attempts can come in all forms, shapes and sizes. No matter how familiar you think you are with them, always remember to take extra precaution when opening an email with attachments or links.
To show how to generate a certificate request in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.:  First we need to log into the Exchange Admin Center. Navigate to the Servers >> Certificates…
This video shows how to quickly and easily add an email signature for all users on Exchange 2016. The resulting signature is applied on a server level by Exchange Online. The email signature template has been downloaded from: www.mail-signatures…

776 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question