question on active sync proxy / redirect in Exchange and urls
Exchange Server A in AD Site A
InternalUrl :https://myexchangeurl.com/Microsoft-Server-ActiveSync
ExternalUrl :https://myexchangeurl.com/Microsoft-Server-ActiveSync
Exchange Server B in AD Site B
InternalUrl :https://myexchangeurl.com/Microsoft-Server-ActiveSync
ExternalUrl :
User A has mailbox on Exchange Server A in AD Site A.
User B has mailbox Exchange ServerB in AD Site B.
Both Exchange servers are multirole CAS/HUB/Mailbox
If a User A connects to CAS server in site A , the first CAS server they hit will provide connection to their Exchange Mailbox Server and the device also update its url if it is not correct ? Or will the CAS server redirect them to use the their own mailbox server for CAS ?
If User A connects to CAS in site B: it will proxy them to Site A and the phone will not be updated with the external URL ?
If a user hits site B: and the mailbox is in site B: since there is no external url it will not redirect the phone to use a different url ?
If Site A goes down do we need to have Exchange Server B externalurl populated ?