HI, is there any clear documentation on how to use a DNS A (and possible C-name)  record pointing to a VIP that load balances between 2 Exchange DAG sites that allow for seemless mobile device (android,iphone,windows mobile) failover ?  Is there another way to accomplish this without using load balanced VIP?

Thank you

No, there is not, because that is not a supported configuration.  We require the use of a load balancer.

Scott or anyone:
Is there any clear documentation on how to set up a DAG for seemless failover and possibly failback for smartphones and portables? Looking for detail on server configuration including URLs for active-sync on both sides of DAG  as well as OWA,etc... Also recommended DNS config. Hoping microsoft or someone has the info for seemless DAG failover anyway that va client is connected. Was thinking of using dyn-dns for external load balancing.
Thank you

Hi,

I suggest you can use DNS for Load Balancing to achieve your goal,

To create DNS Host (A) Records for all internal pool servers

1. Click Start, click All Programs, click Administrative Tools, and then click DNS.
2. In DNS Manager, click the DNS Server that manages your records to expand it.
3. Click Forward Lookup Zones to expand it.
4. Right-click the DNS domain that you need to add records to, and then click New Host (A or AAAA).
5. In the Name box, type the name of the host record (the domain name will be automatically appended).
6. In the IP Address box, type the IP address of the individual Front End Server and then select Create associated pointer (PTR) record or Allow any authenticated user to update DNS records with the same owner name, if applicable.
7. Continue creating records for all member Front End Servers that will participate in DNS Load Balancing.

For example, if you had a pool named pool1.contoso.com and three Front End Servers, you would create the following DNS entries:

FQDN	Type	Data
Pool1.contoso.com	Host (A)	192.168.1.1
Pool1.contoso.com	Host (A)	192.168.1.2
Pool1.contoso.com	Host (A)	192.168.1.3

To enable round robin for Windows Server

1. Click Start, click All Programs, click Administrative Tools, and then click DNS.
2. Expand DNS, right-click the DNS server you want to configure, and then click Properties.
3. Click the Advanced tab, select Enable round robin and Enable netmask ordering, and then click OK.

Thanks.