Exchange 2010 servers can't communicate with Active Directory

Not open for further replies.


Installed exchange2010 2 mailbox and 2 cas & hub servers over hyper v , everything worked well for 1 day .

Then EMC can not intliaze and exchange services on all servers suddenly stopped working .

Checked logs and all exchange servers they all report that they can not communicate with AD servers with the following events

Process MSEXCHANGEADTOPOLOGYSERVICE.EXE (PID=1780). Topology discovery failed, error 0x80040952 (LDAP_LOCAL_ERROR (Client-side internal error or bad LDAP message)).

" Process STORE.EXE (PID=4692). Topology discovery failed, error 0x80040952 (LDAP_LOCAL_ERROR (Client-side internal error or bad LDAP message)). Look up the Lightweight Directory Access Protocol (LDAP) error code specified in the event description. To do this, use Microsoft Knowledge Base article 218185, " Microsoft LDAP Error Codes." Use the information in that article to learn more about the cause and resolution to this error. Use the Ping or PathPing command-line tools to test network connectivity"

" Unable to initialize the Microsoft Exchange Information Store service. - Error 0x96f. "

" Error 0x96f connecting to Active Directory."

Although AD servers are functioning well and all dnssettings are correct . the domain/forest functional levels is windows 2008 R2

can you please help this is my production servers and iam clueless .
Also this message on mailbox servers
It might be worth double-checking your IP addresses, DNS settings, etc, and possibly running tools like DCDIAG and NLTEST (from the Exchange server) to confirm that there are no connectivity issues and that the server is in the correct AD site, etc.Neil Hobson, Exchange MVP
Last person who ran into this on this forum had to reboot their DC to get the errors to go away.
For anyone elses' reference, I had a similar issue I struggled with overnight after a restart; Event ID's 2114, 2080, 2601, 2604 and more; all related to MSExchange ADAccess failure to discover topology/active directory access errors. The Exchange Servers group had the proper server in it, an the correct permissions were set in the Default Domain Controllers Group Policy for manage auditing and security logs --- something else was amiss.

Earlier this week a staff member had 'inadvertently' powered off the primary APC Battery Backup which abruptly turned off the Exchange server, and caused some database corruption I had to manually repair. This fresh in my mind, and now its not starting, I focused on that.

After pulling a lot of hair, and chain smoking far too many packs of cigarettes drilling through all the Exchange errors, it came down to something rudamentarily simple --- Antivirus.

During the restart this evening our Antivirus did a fresh install/upgrade and it wiped the Exceptions. Putting in folder exceptions for C:\Program Files\Microsoft\Exchange and D:\Exchange Server (our DB's are on a separate disk channel/array) all the Exchange services started successfully and normally.
Not open for further replies.
Similar threads
Thread starter Title Forum Replies Date
M Outlook 2010 Outlook 2010 with O365 / Exchange Online Using Outlook 0
Diane Poremsky Organizational Forms Library in Exchange 2010 Using Outlook 0
V Recover exchange 2010 edb Exchange Server Administration 2
B Exchange 2010 / Outlook 20070 "client error in synchronization log" Exchange Server Administration 1
T Renaming an Resource in Exchange 2010 Exchange Server Administration 1
P Outlook 2010 MS Exchange Calendar to Android- ical or webdav? Using Outlook 1
Fozzie Bear Outlook 2010 or 2013 Dual Configuration Exchange + IMAP Exchange Server Administration 6
H In Exchange 2010, how to block an email containing an attachment that has foreign characters Exchange Server Administration 1
Digitally Hip Outlook 2010 (32) and Exchange 2010 (sp3) sender info not displaying in Outlook Using Outlook 1
A give User Read Only access to secondary mailbox in Exchange 2010 via AD Exchange Server Administration 1
N Outlook 2010 exchange - auto-move emails from @domain Exchange Server Administration 1
V Outlook 2013 cant stay connected to exchange 2010 Exchange Server Administration 5
D cleaning up old Exchange 2003 data on Exchange 2010 Exchange Server Administration 2
L Weird Inbox problems Outlook 2010/13 and Exchange Exchange Server Administration 2
R Exchange 2013/Outlook 2010 Slow Startups Exchange Server Administration 8
Z Outlook 2010 client to Exchange ,,,,search not working proparly Exchange Server Administration 0
M First post -help with managing two calendars Outlook 2010 /Exchange 2010 Using Outlook 0
T Outlook INBOX emails gone back 2-3 weeks after Exchange Server 2010 Restart Using Outlook 0
A Exchange 2003 Outlook 2010 64 Bit- AutoDiscover Connection Err - Certificate Exchange Server Administration 9
C Outlook 2010, two exchange mailboxes configured.Unable to see 2ndrymeeting req Using Outlook 2
C Exchange 2010 / Emails received show with display name and not email address Using Outlook 2
P correct public folder migration exchange 2003 to 2010 Exchange Server Administration 1
S Unable to send or reeceive email in new Exchange 2010 Exchange Server Administration 0
A File - Save Attachments does nothing in Outlook 2003 with Exchange 2010 ... Using Outlook 3
B Sharing Multiple Outlook 2010 Calendars (Exchange) Exchange Server Administration 4
P can't set IRM configuration in Exchange 2010 Exchange Server Administration 2
B Using hosted exchange to sync outlook 2010 calendars and contacts to BB Z10 Using Outlook 4
S Outlook 2010/Exchange 2010 Multi Mailboxes (Server unavailable) Using Outlook 6
O outlook 2010, owa, exchange Exchange Server Administration 2
D why do exchange contacts not sync properly from outlook 2011 to outlook 2010 Exchange Server Administration 2
J Exchange 2010 free/busy shows hashmarks in scheduling tab when not organizer Exchange Server Administration 6
C Exchange 2010 - Outlook 2010 - Exchange Server Administration 4
Fozzie Bear Outlook 2010 wont remember Exchange Credentials on log off /shutdown of Win7 Exchange Server Administration 2
T Exchange 2010: 'could not save item' and 'Unknown error' when edit calendars Exchange Server Administration 1
I Shared Contacts in Outlook 2010 and Exchange Server 2010 Using Outlook 4
A emails disappearing from inbox outlook 2010 exchange server 2010 major trouble Exchange Server Administration 6
J OL2003 Public Folder Sync Errors w/ Exchange 2010 Exchange Server Administration 11
B Outlook 2010 won't configure exchange account, 0kb .ost file Exchange Server Administration 5
R Thousand of sync issues on Outlook clients with Exchange 2010 Exchange Server Administration 5
R Create a contacts list on Exchange 2010 Exchange Server Administration 10
T Exchange / Outlook 2010 - How to cancel meetings but retain the calendar entry Using Outlook 4
S Outlook Quick Steps - Exchange 2003 / Exchange 2010 Exchange Server Administration 2
R Sharing Exchange 2010 calendars with people outisde our organization Exchange Server Administration 17
A Exchange 2010 Outlook 2010 and Local Failures sync issue Exchange Server Administration 5
B Exchange 2010 / Outlook 2010 - Group Folder issues Exchange Server Administration 6
U Exchange 2010 & mailbox database Quotas Exchange Server Administration 1
T Outlook 2010/Exchange 2003: Meeting Organizer doesn't show Using Outlook 1
C Outlook/Exchange 2010 Recover Deleted Items to original folder Using Outlook 2
D large mailbox question using 2010 on exchange 2k3 Exchange Server Administration 2
R Change Outlook 2010 Exchange server address via registry or script Using Outlook 5

Similar threads