exchangeexchange.com
Figure 6-13
It is possible to override the redirection behavior so a CAS will proxy the connection even when the
ExternalURL is set. In this scenario, the user attempts to connect to webmail.exchangeexchange.com ,
which is CAS A. CAS A sees that the ExternalURL parameter is configured on CAS B, so it tries to redirect
the client. If the Internet connection to CAS B is unavailable for any reason, the user ??™ s attempt to use
OWA (CAS B) fails. By temporarily setting the RedirectToOptimalServer to false, CAS A will proxy,
even though CAS B has the ExternalURL set. Of course this requires that Site A and Site B can still communicate
with each other. (See Figure 6 - 14 .)
The cmdlet to the override redirection would look like this:
Set-OwaVirtualDirectory -Identity ???owa (default web site)??? -
RedirectToOptimalOWAServer:$false
If the second CAS has the ExternalURL set, the Internet CAS redirects the connection to the URL
specified. This is often used when there are multiple geographies or costly WAN links. Exchange always
tries to use the CAS closest to the user ??™ s mailbox. (See Figure 6 - 13 .)
Chapter 6: Confi guring the Client Access Server Role
183
Figure 6-14
Outlook Anywhere
Outlook Anywhere was formerly known in previous versions of Exchange as RPC over HTTP.
Pages:
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282