For the last 6 months I have enjoyed the near flawless operation of my OWA Server. Monday that ceased, following a power failure in our data center OWA is no longer able to communicate with Exchange.
NETDIAG passed tests
owa front end server
Static ip addresses with the correct addresses and DNS server.
The SA will not start on OWA
Getting a DS error
Event Type: Error
Event Source: MSExchangeDSAccess
Event Category: Topology
Event ID: 2114
Time: 3:39:36 PM
Process EXMGMT.EXE (PID=1264). Topology Discovery failed, error 0x8007077f.
I have reconfigured IIS and Exchange authentication based on Article ID:327843
I am able to telnet to the prescribed ports
For Exchange Communication:
o Port 80 for HTTP
o Port 691 for Link State Algorithm routing protocol
* For Active Directory communication:
o Port 389 for LDAP (TCP and UDP)
o Port 3268 for Global Catalog Server LDAP (TCP)
o Port 88 for Kerberos Authentication (TCP and UDP)
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