Autodiscover two AD sites two cas arrays

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skipster

how would i configure autodiscover in DNS for a DAG that was ACtive\ACtive meaning live mailboxes in each datacenter? i would want users who have mailboxes in ADsiteA to be pointed to the casarrayA that lives in ADsiteA for autodiscover, and for users who have mailboxes in ADsiteB i want them pointed to cassarraB that lives in ADsiteB. If my internal domain name is mydomain.com, and i have a DNS zone called "mydomain.com" and i create an A record called autodiscover.mydomain.com then what casarray would i point this ip address to?Bulls on Parade
 
S

Sembee [MVP]



The autodiscover URL is only used by external clients, or clients that are not members of the domain.
Internal clients that are members of the domain get their information from the domain, not from the autodiscover URL.

However you can point autodiscover at any CAS Exchange server, because the amount of data it transfers is tiny, a few kb, as it is just XML configuration information.

Simon.

Simon Butler, Exchange MVP
Blog | Exchange Resources
 
S

skipster



I understand that the *URL*is only used for external cleints, however internal clients will query AD for this record (as you mentioned) but the record for autodiscover service in AD is a url. So knowing this if the autodiscover url or scp (serivce connection point ) was mail.mydomain.com/autodiscover/autodiscover.xml then i would need to point this record to my NLB cas array. I agree that the traffic is tiny, so it doesnt matter to much what NLB cas servers i point the record to. However if a user connects to the nlb cas array for autodiscover in AD siteA but there mailbox is located in AD siteB would the nlb cas servers in AD site A proxy the request to the NLB cas servers in AD siteB?

Thanks again

Bulls on Parade
 
S

Sembee [MVP]



I don't believe that autodiscover is proxied, because the data is being pulled off the domain.

All autodiscover is doing is telling the Outlook client where to look. Given the traffic is so small, there is little point in proxying it - it would save a couple of kb at most.

Simon.

Simon Butler, Exchange MVP
Blog | Exchange Resources
 
A

Allen Song



Hi,

First, Outlook will query the AD to get all available SCP objects, then sorts the SCP record into In-site, Out-of site based on the Outlook physical location. Then it will use the autodiscover of that site to get the relevant configuration directly.

For example, TestA is the mailbox of the Site B, log on the Outlook in Site A. It will use the autodiscover of the Site A to get the basic information and relevant services URL from the AD directly. But for the Free/Busy and OOF, it will proxy the request from the Site A to Site B.

Thanks

Allen

Allen Song
 
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