autodiscover from another domain

Eprs_Admin
Eprs_Admin used Ask the Experts™
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Hi Experts,

I am accessing my exch2007 server from another domain.
But how to setup autodiscover from the foreign domain to my domain with my EXCH2007 server ?
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MaheshArchitect
Distinguished Expert 2018

Commented:
I believe you have forest / domain trust and have linked mailboxes

You can create domain.com dns zone (SMTP domain) on your DNS server and create autodiscover host(A) record pointing to exchange CAS server FQDN (may be you have NLB FQDN)

Because domain joined corporate outlook clients 1st try to locate SCP in AD which is not available in non exchange domains and hence autodiscover will try to resolve exchange server with autodiscover record
The last alternative could be you can create SRV record for autodiscover in your DNS pointing to CAS server in exchange domain
Eprs_AdminSystem Architect

Author

Commented:
since now I have no domain trust.
MaheshArchitect
Distinguished Expert 2018

Commented:
Still autodiscover record should help you to locate exchange server and configure outlook (outlook anywhere)
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Eprs_AdminSystem Architect

Author

Commented:
do I need a trust or is it possible without ?
MaheshArchitect
Distinguished Expert 2018

Commented:
for outlook anywhere to work no trust is required

outlook anywhere is protocol run on rpc over https directly from internet

outlook can be configured as long as autodiscover.domain.com is accessible to clients either from internet / intranet where domain.com is your SMTP domain
Eprs_AdminSystem Architect

Author

Commented:
ok and when I not use outlook anywhere , then a trust is needed ?
A two way trust or a one way trust is enough ?
Which direction ?
Eprs_AdminSystem Architect

Author

Commented:
My situation is ...

The exchange in domain K  will be removed.
All mailboxes needs to be moved to my smtp domain , domain H .
In the end I have just one exchange server for two different domains.

Are these linked mailboxes ?
Or what kind of scenario is this called ?
I also need autodiscover, do I need a trust in this case ?
SteveArchitect/Designer
Commented:
there may be more to this than you have stated, but in principle the autodiscover is really simple.

Each e-mail domain needs an autodiscover, which points to your existing exchange server.
Either this resolves to a central autodiscover FQDN or to a separate FQDN for each e-mail domain (if you have an SSL which covers them all)

any e-mail domain the exchange server is configured to accept, and has mailboxes for, will provide settings to the users automatically as long as they can reach the autodiscover.
Architect
Distinguished Expert 2018
Commented:
Your original question and your last statement are not related to each other

Autodiscover and cross forest migration are two separate scenarios
You can access other domain mailbox over autodiscover as long as you have user id / password from that domain (outlook anywhere), for that trust is not required

You are talking about cross forest exchange mailbox migration now?
For that you do need forest trust

Are you using link mailboxes?
Where account forest contains only user account and do not have exchange server installed and resource forest contains exchange servers along mailboxes associated with user account in account forest
For this to operate forest trust is required..
I believe you are not using link mailboxes,

You must be having exchange installed in both domains and now you wanted to migrate mailboxes from one domain to other, right?

Your high level steps could be:
setup name resolution between both domains followed by forest trust
use preparemoverequest.ps1 (exchange native script to provision user mailboxes from source domain to target domain as mail enable users
use ADMT to merge SID History
Then use new-moverequest cmdlet from exchange shell to move mailbox
Finally migrate computer

You can search net for cross forest mailbox move so that you will get an Idea, what you are looking for..
Eprs_AdminSystem Architect

Author

Commented:
Thanks a lot , I will look for it.

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